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A2 adverb, conjunction /haʊˈɛvər/

however

然而
Meaning
used to introduce a statement that contrasts with or seems to contradict something previously said
Example
The journey was long; however, it was enjoyable.
旅程很长；然而，它是愉快的。
C1 noun /ˈhæv.ək/

Havoc

广泛的破坏；极大的混乱或无序；混乱
Meaning
widespread destruction; great confusion or disorder; chaos
Example
The hurricane wreaked havoc on the coastal towns, destroying homes and businesses.
飓风在沿海城镇造成了大规模的破坏，摧毁了房屋和商业。
B1 adjective /hɪˈstɔːrɪkəl/

historical

历史的
Meaning
Related to history or past events.
Example
The museum has a large collection of historical documents.
博物馆收藏了大量历史文件。
C2 noun /ˈhɪlək/

hillock

小丘
Meaning
A small hill or mound.
Example
The children climbed up the grassy hillock to watch the sunset.
孩子们爬上了草地上的小丘去看日落。
B2 adjective haɪˈdʒiː.nɪk

hygienic

卫生的
Meaning
Conducive to maintaining health and preventing disease, especially by being clean.
Example
Maintaining hygienic conditions in hospitals is crucial.
在医院保持卫生条件至关重要。
B1 adjective /ˈhoʊpfəl/

Hopeful

充满希望
Meaning
feeling or inspiring optimism about a future event; confident; optimistic
Example
He remained hopeful despite the challenges.
尽管面临挑战，他依然充满希望。
C2 noun /haɪnd/

Hind

母鹿
Meaning
a female deer, especially a red deer
Example
The hind protected her fawn from predators.
母鹿保护了她的小鹿免受捕食者的伤害。
B2 noun /hʌb/

hub

中心
Meaning
the central part of a place or activity where things converge
Example
The city is the hub of the country's trade network.
这座城市是该国贸易网络的中心。
A1 verb /ˈhæpən/

happen

发生
Meaning
to occur or take place; to come about by chance
Example
What happened at the meeting yesterday?
昨天会议上发生了什么?
C2 adjective /ˌhɛtərəʊˈmɔːrfɪk/

heteromorphic

异形的
Meaning
Having different forms or shapes, especially in the same species or organism.
Example
Butterflies are heteromorphic during their life cycle, changing forms from larva to adult.
蝴蝶在它们的生命周期中是异形的，从幼虫到成虫改变形态。
C1 verb /hjuːˈmɪlieɪt/

humiliate

侮辱
Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
他因公共失败而感到羞辱。
C1 noun /ˈhɑː.stɪdʒ/

Hostage

人质
Meaning
a person seized or held as security for the fulfillment of a condition; captive
Example
The police negotiated carefully to secure the release of all hostages unharmed.
警方小心谈判，确保所有人质无伤释放。
A2 adjective ˈhjuː.mən

human

人类的
Meaning
Relating to or characteristic of people or human beings; showing the better qualities of humankind, such as kindness.
Example
Human values shape social systems.
人类的价值观塑造了社会体系。
C1 adjective /hjuːˈmeɪn/

humane

人道的
Meaning
Showing compassion or benevolence.
Example
The doctor provided humane treatment to the injured animals.
医生对受伤的动物提供了人道治疗。
A1 adjective /haɪ/

high

高
Meaning
At or to a great height; greater than normal in amount, degree, or intensity.
Example
The mountain peak is very high.
山顶非常高。
B2 adjective /hɑːrʃ/

Harsh

严厉的; 粗糙的; 残酷的; 严格的
Meaning
unpleasantly hard or rough in texture; cruel or severe
Example
The teacher gave harsh criticism about my work.
老师对我的工作给出了严厉的批评。
B2 noun /ˈhæz.ərd/

Hazard

危害; 风险
Meaning
a danger or risk; something that poses a threat to safety
Example
Smoking is a serious health hazard that can lead to lung cancer and heart disease.
吸烟是一种严重的健康危害，可能导致肺癌和心脏病。
B2 adjective /ˌhɒrɪˈzɒntəl/

horizontal

水平的
Meaning
parallel to the horizon; flat and level from side to side
Example
The table must be perfectly horizontal to keep the glass from sliding.
桌子必须保持水平，杯子才不会滑动。
B2 noun/verb /hɜːrd/

herd

Meaning
a large group of animals of the same type that live and feed together; or to gather animals into a group.
Example
The shepherd herded the sheep into the pen.
A2 verb /hʌɡ/

hug

拥抱
Meaning
to hold someone tightly in your arms to show affection or comfort
Example
She hugged her friend before leaving for the airport.
她在去机场前拥抱了她的朋友。
B1 noun /ˈhæŋ.kər.tʃɪf/

Handkerchief

手帕
Meaning
a small piece of cloth used for wiping the nose or face
Example
She always carries a clean handkerchief in her purse.
她总是在包里带一条干净的手帕。
C2 noun ˌhiː.məˈfɪl.i.ə

hemophilia

血友病
Meaning
A medical condition in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.
Example
Hemophilia treatment benefits from genetic editing.
血友病治疗受益于基因编辑。
C2 adjective /ˌhæɡ.i.əˈɡræf.ɪk/

hagiographic

过度恭维的
Meaning
Excessively flattering or idealized, often in a biography or portrayal of someone.
Example
The documentary was criticized for its hagiographic portrayal of the leader.
这部纪录片因其对领导者的过度恭维描写而受到批评。
C2 noun ˈhɑːrbərɪdʒ

harborage

藏身处
Meaning
A place of shelter or refuge for pests or animals.
Example
Pests need a harborage site to survive and breed.
害虫需要一个藏身处来生存和繁殖。
A1 noun /ˈaʊər/

hour

Meaning
A period of time equal to 60 minutes.
Example
The meeting lasted for two hours.
C1 adjective /həˈred.ɪ.ter.i/

Hereditary

遗传的; 从祖先传承
Meaning
passed down through family genes; inherited from ancestors
Example
The hereditary disease was passed down through generations.
遗传性疾病通过几代人传递。
C2 noun /ˈhjuːməs/

humus

腐殖土
Meaning
The dark, organic material in soil formed from decayed plants and animals.
Example
The gardener enriched the soil with humus to improve plant growth.
园丁将腐殖土混入土壤中以促进植物生长。
B2 adjective /hɑːˈspɪtəbəl/

Hospitable

友好且热情地接待陌生人或客人; 热情好客
Meaning
friendly and welcoming to strangers or guests; generous in receiving guests
Example
The local people were very hospitable to the tourists.
当地人对游客非常热情好客。
C1 adjective /həˈbɪtʃuəl/

habitual

习惯性的
Meaning
Done or doing constantly or as a habit; customary.
Example
He was a habitual latecomer to class.
他是一个上课习惯性迟到的人。
C2 noun /ˌɒnəˈreəriəm/

honorarium

酬金
Meaning
A payment given for professional services that are rendered without a fee.
Example
The guest lecturer received an honorarium for her talk.
那位客座讲师因其讲座而获得了酬金。
C2 adjective /ˌhɑːrdˈbɪtn̩/

hard-bitten

坚韧且经验丰富
Meaning
tough and experienced, not easily affected by emotions or hardship
Example
The hard-bitten detective showed no sign of surprise at the crime scene.
那个经验丰富的侦探在犯罪现场毫无惊讶之情。
C2 noun /ˈhæbɪtənt/

habitant

居民
Meaning
An inhabitant; a person or animal that lives in a particular place.
Example
The habitants of the village were friendly and welcoming.
村庄的居民友好而热情。
C1 noun /hɪˈpɑː.krə.si/

Hypocrisy

伪善
Meaning
the practice of claiming to have moral standards that one does not actually possess; insincerity
Example
His hypocrisy was exposed when he criticized others for the same mistakes he had made.
当他因为自己犯过的同样错误而指责别人时，他的伪善暴露无遗。
C2 noun phrase /ˌhjuː ən ˈkraɪ/

hue and cry

抗议声
Meaning
A loud public outcry or protest, often demanding action.
Example
There was a hue and cry over the new policy changes.
因新政策变化，爆发了激烈的抗议声。
B2 noun ˈhoʊmˌskuː.lɪŋ

homeschooling

在家教育
Meaning
The practice of educating children at home rather than sending them to a school.
Example
Homeschooling allows parents to tailor education to their child's needs.
家庭教育使父母能够根据孩子的需要定制教育。
C2 noun /ˈhɔːzər/

hawser

用于系船或拖船的粗绳
Meaning
A thick rope or cable used in mooring or towing a ship.
Example
The sailors secured the ship to the dock with a heavy hawser.
水手们用一根重的豪泽把船固定在码头。
C1 noun /haɪˈpɒtənjuːs/

hypotenuse

斜边
Meaning
the longest side of a right-angled triangle, opposite the right angle.
Example
In a right triangle, the hypotenuse is always longer than the other two sides.
在直角三角形中，斜边总是比另外两边长。
C2 noun /ˌhæŋ.ər ˈɒn/

hanger-on

跟班
Meaning
a person who spends time with a powerful or famous person to gain benefits.
Example
The celebrity was always surrounded by hangers-on.
这位名人总是被跟班围绕着。
A1 noun /hɔːrs/

Horse

马
Meaning
a large domesticated mammal used for riding and pulling loads
Example
The horse galloped across the field with great speed.
马在田野里快速奔跑。
C1 noun /ˈhed.weɪ/

Headway

进展; 进步; 向前迈进
Meaning
forward movement or progress, especially when this is slow or difficult
Example
Despite the challenges, the research team made significant headway in developing the new vaccine.
尽管面临挑战，研究团队在开发新疫苗方面取得了显著的进展。
B2 adjective /hɪˈstɛrɪkəl/

hysterical

极其搞笑或情绪失控
Meaning
Extremely funny or uncontrollably emotional.
Example
The comedian's jokes were absolutely hysterical.
这位喜剧演员的笑话简直太搞笑了。
C1 adjective /haɪˈdrɔːlɪk/

hydraulic

液压的
Meaning
operated by the pressure of liquid, especially water or oil
Example
The mechanic repaired the hydraulic system of the machine.
机械师修理了机器的液压系统。
C2 noun /hɪˈdʒɛməni/ or /ˈhɛdʒəmoʊni/

hegemony

霸权
Meaning
leadership or dominance, especially by one state or group over others
Example
The empire maintained its hegemony over neighboring states.
帝国保持了对邻国的霸权。
C1 noun /ˈhʌbʌb/

hubbub

喧闹
Meaning
a loud noise caused by a crowd of people talking or shouting
Example
There was a hubbub in the market as the sale began.
市场上因为销售开始而产生了喧闹。
B2 adjective /ˈhoʊm.sɪk/

Homesick

想家; 离家的悲伤
Meaning
experiencing a longing for one's home during a period of absence from it; missing home
Example
After three months studying abroad, Maria felt increasingly homesick for her family.
在国外学习三个月后，玛丽亚越来越想念她的家人。
C2 adjective /hɪk/

Hick

乡巴佬; 农民
Meaning
unsophisticated person from a rural area; country bumpkin
Example
He had a hick accent from growing up in a small town.
他有着乡巴佬的口音，因为他在一个小镇长大。
B2 noun /haɪv/

Hive

蜂巢; 一个充满活动的地方
Meaning
a structure in which bees live and produce honey; a place full of busy activity
Example
The garden was buzzing with activity as bees flew back and forth from their hive.
花园里充满了活动，蜜蜂在它们的蜂巢之间来回飞翔。
B1 verb /hʊk/

hook

钩子
Meaning
to catch with a hook; to fasten
Example
He hooked the fish successfully.
他成功地钩住了那条鱼。
C1 adverb /ˈhɑr.tɪ.li/

Heartily

衷心地; 全心全意
Meaning
in a sincere and enthusiastic manner; wholeheartedly
Example
She heartily welcomed her guests to the party.
她衷心地欢迎她的客人来到派对。
A2 adjective /ˈɑːnɪst/

honest

诚实
Meaning
free of deceit and untruthfulness; sincere
Example
She is known as an honest and trustworthy person.
她被认为是一个诚实和值得信赖的人。
B2 adjective /ˈhɜː.bəl/

herbal

草药的
Meaning
Made from or containing herbs, especially for medicinal purposes.
Example
Herbal remedies were widely used here.
这里广泛使用草药疗法。
C2 adjective /ˌhæfˈbeɪkt/

half-baked

半生不熟
Meaning
poorly thought out or badly planned
Example
The manager quickly rejected his half-baked proposal.
经理迅速拒绝了他半生不熟的提案。
C2 adjective /ˌhɪstriˈɒnɪk/

histrionic

Meaning
Overly dramatic or theatrical in behavior or style.
Example
Her histrionic reaction to the small problem surprised everyone.
A2 noun /hɑːrt/

Heart

心脏
Meaning
the organ in the chest that pumps blood through the body; the center of emotions and feelings
Example
The doctor listened to my heart with a stethoscope.
医生用听诊器听我的心脏。
B2 noun /heə(r)/

Hare

野兔
Meaning
a fast-running long-eared mammal that resembles a large rabbit
Example
The hare quickly ran across the field.
这只野兔快速地跑过田野。
C2 noun /ˌhɜːrpəˈtɒlədʒɪst/

herpetologist

爬虫学家
Meaning
A scientist who studies reptiles and amphibians.
Example
The herpetologist discovered a new species of frog in the rainforest.
爬虫学家在雨林中发现了一种新青蛙物种。
C2 noun /ˈhaɪərlɪŋ/

hireling

雇佣者
Meaning
A person who works for payment only, often with little loyalty or principle.
Example
The mercenary was dismissed as just a hireling with no real loyalty.
雇佣兵被解雇，只是一个没有真正忠诚的雇佣者。
C1 noun /ˈheɪˌdeɪ/

heyday

黄金时期
Meaning
The period of greatest success, popularity, or power.
Example
In its heyday, the company dominated the market.
在黄金时期，公司主导了市场。
C1 noun /ˈhɪntərlænd/

hinterland

内陆地区
Meaning
The remote or less developed areas away from the coast or a city.
Example
The farmers came from the rural hinterland to sell their produce in the city.
农民们从乡村的内陆地区来到城市销售他们的产品。
A1 noun, verb /hɛd/

head

头 / 领导
Meaning
The upper part of the human body or to lead or be in charge of something.
Example
She turned her head to look out the window.
她转动头来向窗外看。
C1 noun /ˈhɔː.kər/

Hawker

小贩
Meaning
a person who travels about selling goods, typically from door to door or on the street
Example
The hawker sold fresh fruits from his cart.
小贩从他的推车里卖出了新鲜的水果。
A2 noun /hɛlθ/

health

健康
Meaning
The state of being free from illness or injury.
Example
Exercise is important for good health.
锻炼对保持良好的健康很重要。
C1 adjective ˌhaɪ.pəˈθet.ɪ.kəl

hypothetical

假设的, 假定的, 理论的
Meaning
Based on or serving as a hypothesis; supposed but not necessarily real or true.
Example
The discussion was based on hypothetical scenarios.
讨论基于假设的场景。
A2 pronoun /hɪmˈself/

himself

他自己
Meaning
Used to emphasize that a male person does something by his own effort.
Example
He fixed the car himself.
他自己修好了车。
C2 noun /ˌhaɪdrəˈstætɪks/

hydrostatics

水静力学
Meaning
The branch of science concerned with the mechanical properties of fluids at rest.
Example
Hydrostatics is essential in understanding how dams and reservoirs function.
水静力学对于理解大坝和水库的工作原理至关重要。
A1 noun /her/

Hair

头发
Meaning
any of the fine thread-like strands growing from the skin of humans and animals
Example
She decided to cut her long hair short for a fresh new look this summer.
她决定在这个夏天剪短她的长发，打造一个清新的新形象。
A1 noun /ˈhɒs.pɪ.təl/

hospital

医院
Meaning
an institution where sick or injured people are given medical treatment
Example
He was taken to the hospital after the accident.
事故发生后，他被送往医院。
B2 noun /ˈhæn.di.krɑːft/

Handicraft

手工艺
Meaning
an activity involving the making of decorative domestic or other objects with the hands; handmade artistic work
Example
The local market featured beautiful handicrafts made by skilled artisans from the region.
当地市场展示了由该地区熟练工匠制作的美丽手工艺品。
B1 noun /ˈhʌntər/

hunter

猎人
Meaning
a person or animal that hunts animals for food or sport
Example
The hunter tracked the deer through the forest.
猎人追踪鹿穿越森林。
C1 noun /ˈhæŋ.ər/

Hanger

衣架
Meaning
a shaped piece of wood, plastic, or metal with a hook at the top, used to hang up clothes
Example
She hung her dress on a wooden hanger to prevent it from getting wrinkled.
她把裙子挂在一个木衣架上，以防止它起皱。
C2 noun /ˈheɪ.deɪ/

Hey day

黄金时期; 最辉煌的时刻; 顶峰时期
Meaning
the period of a person's or thing's greatest success, popularity, or vigor; prime time
Example
During her heyday as a singer, she performed in sold-out concerts around the world.
在她作为歌手的黄金时期，她在全球的售罄音乐会上表演。
C1 adjective /ˈhɔːltɪŋ/

halting

犹豫不决
Meaning
slow and hesitant, especially due to lack of confidence
Example
She gave a halting reply during the interview.
她在面试中给出了迟疑的回答。
C1 adverb /ˈhɛdˌlɔŋ/

headlong

全速前进
Meaning
With the head leading; in a rush or without thinking.
Example
She rushed headlong into the new project.
她全速前进地投入了新的项目。
C2 noun /ˈhɛdʒɪrə/ or /hɪˈdʒaɪrə/

hegira

迁徙, 流亡
Meaning
a journey, especially when undertaken to escape from a dangerous or undesirable situation
Example
The refugees began their hegira across the desert.
难民们开始了穿越沙漠的迁徙。
B2 adverb /hɛns/

hence

因此
Meaning
for this reason; as a result
Example
She was the best candidate, hence she was chosen for the job.
她是最优秀的候选人，因此她被选中担任这份工作。
B2 noun /hoʊm ˈdɪstrɪkt/

home district

家乡地区
Meaning
the district where a person was born or originally comes from
Example
He returned to his home district after many years abroad.
他在国外多年后回到了自己的家乡地区。
C2 adjective /hərˈmɛtɪk/

hermetic

密封的
Meaning
Completely sealed, especially so that no air can enter or escape.
Example
The medicine was kept in a hermetic container.
药物被保存在一个密封的容器中。
B2 noun /ˈher ˌpɪn/

Hair pin

发簪
Meaning
a thin piece of metal or plastic used to hold hair in place
Example
She used several hair pins to secure her elegant updo.
她用几根发簪固定住她的优雅盘发。
C1 noun /ˈhɑː.mə.nɪm/

homonym

同音异义词
Meaning
A word that is spelled and pronounced like another word but has a different meaning.
Example
The word 'bat' is a homonym because it can mean an animal or a sports tool.
'蝙蝠'这个词是一个同音异义词，因为它可以指代动物或运动器材。
C1 noun /hɑːrp/

Harp

竖琴
Meaning
a large triangular musical instrument with strings that are plucked
Example
The angel played a beautiful melody on the harp.
天使在竖琴上弹奏了一首美丽的旋律。
B1 noun /ˈhel.mət/

Helmet

头盔
Meaning
a hard or padded protective hat worn by motorcyclists, construction workers, or soldiers
Example
The cyclist always wore a bright yellow helmet for safety and visibility while riding.
骑行者总是戴着一顶亮黄色的头盔，以保证安全性和可见性。
A1 interjection /haɪ/

hi

嗨
Meaning
a friendly greeting used when meeting someone
Example
Hi, it's nice to meet you!
嗨，很高兴见到你！
C1 noun /hʌl/

hull

船体 / 种子外壳
Meaning
The outer covering of a seed or fruit; also the main body of a ship.
Example
The sailors inspected the ship’s hull for any damage.
水手们检查了船体是否有损坏。
C2 noun /ˈhʌmbʌɡ/

humbug

骗局, 胡说
Meaning
Deceptive or false talk or behavior; nonsense.
Example
He dismissed the idea as humbug.
他将这个想法视为胡说八道。
C1 noun ˌhaɪ.pɚˈten.ʃən

hypertension

高血压
Meaning
Abnormally high blood pressure.
Example
High sodium intake leads to hypertension.
高钠摄入会导致高血压。
C1 noun /hoʊks/

Hoax

骗局; 欺骗; 愚弄
Meaning
a humorous or malicious deception; something intended to trick or deceive people
Example
The news about aliens landing turned out to be an elaborate hoax created by pranksters.
外星人着陆的新闻结果证明是一种由恶作剧者创造的精心策划的恶作剧。
C2 noun /ˈhɑːr.bɪn.dʒər/

Harbinger

先兆
Meaning
a person or thing that announces or signals the approach of another; a forerunner of something
Example
The first robin of spring is often considered a harbinger of warmer weather to come.
春天的第一只知更鸟常被认为是即将来临的温暖天气的先兆。
A2 noun /hɒt drɪŋk/

Hot-drink

热饮
Meaning
a warm or heated beverage consumed for refreshment or comfort
Example
I prefer a hot drink like tea or coffee in the morning.
我喜欢早上喝一杯热饮，如茶或咖啡。
A1 noun /hænd/

Hand

手
Meaning
the end part of a person's arm beyond the wrist, including the palm, fingers, and thumb
Example
He raised his hand to ask a question.
他举起手来问问题。
B2 noun ˈhæb.ɪt fɔːrˌmeɪ.ʃən

habit formation

习惯形成
Meaning
The process of creating a habit through regular practice and repetition.
Example
Habit formation requires consistency and discipline.
习惯的形成需要一致性和纪律。
C2 noun /ˌhaɪdroʊˈfoʊbiə/

hydrophobia

恐水症
Meaning
Extreme or irrational fear of water; historically, another name for rabies.
Example
After being bitten by a stray dog, the man was treated for hydrophobia.
在被流浪狗咬伤后，该男子接受了对水恐症的治疗。
C2 verb /ˈhɑːrkən/

hearken

专心听
Meaning
To listen attentively; to give heed.
Example
He would hearken to his mentor’s advice before making decisions.
他在做决定之前，会专心听导师的建议。
A2 noun /ˈhɒki/

hockey

曲棍球
Meaning
a sport played with sticks and a ball or puck on ice or a field
Example
He plays hockey for the national team.
他为国家队打曲棍球。
B2 noun /ˈhæb.ɪ.tæt/

habitat

栖息地
Meaning
The natural environment where an organism lives and meets its needs.
Example
The polar bear's natural habitat is the Arctic region.
北极熊的自然栖息地是北极地区。
B1 verb /ˈhaɪˌlaɪt/

highlight

突出
Meaning
to emphasize or make something stand out
Example
The teacher highlighted the most important points in the text.
老师在文本中强调了最重要的要点。
A1 interjection /heɪ/

hey

嘿
Meaning
used to attract attention, express surprise, or greet someone
Example
Hey, how are you doing today?
嘿，你今天怎么样？
C1 noun (plural) /ˈhɪntərlændz/

hinterlands

偏远地区
Meaning
Plural of hinterland; remote or less developed regions.
Example
Explorers traveled deep into the hinterlands of the country.
探险者深入到该国的偏远地区。
C2 verb /ˈhɑːrtən/

hearten

鼓舞
Meaning
To give courage, confidence, or hope.
Example
The teacher’s encouragement heartened the students.
老师的鼓励给学生们带来了勇气。
C1 adjective /ˌhæpˈhæz.ɚd/

haphazard

杂乱无章
Meaning
Lacking any obvious principle of organization; random.
Example
His haphazard approach led to project failure.
他的杂乱无章的方法导致了项目失败。
C2 noun /hɒtʃ pɒtʃ/

Hotch potch

杂烩
Meaning
A mixed dish; a hodgepodge of ingredients cooked together
Example
She made a delicious hotch potch with rice, lentils, and vegetables.
她做了一道美味的霍奇波奇，里面有米饭、扁豆和蔬菜。
C2 adjective /ˈhæŋ.dɔːɡ/

hangdog

尴尬
Meaning
looking or feeling ashamed, guilty, or defeated.
Example
He gave me a hangdog look after being caught lying.
他在被抓到撒谎后，给了我一个尴尬的表情。
C2 noun /hoʊ/

Hoe

锄头
Meaning
a gardening tool with a thin metal blade used for breaking up soil and removing weeds
Example
The farmer used a hoe to remove weeds from his vegetable garden.
农夫使用锄头从他的蔬菜园中移除杂草。
C2 noun /ˈhʌvəl/

hovel

Meaning
a small, poorly built, and dirty house
Example
The refugees lived in a makeshift hovel.
C2 noun /hɪˈlærɪti/

hilarity

爆笑
Meaning
Extreme amusement, especially when expressed by laughter.
Example
The movie caused great hilarity among the audience.
这部电影在观众中引起了极大的爆笑。
C2 noun /ˌhɛtərəʤəˈniːɪti/

heterogeneity

异质性
Meaning
the quality or state of being diverse in character or content
Example
The cultural heterogeneity of the city makes it vibrant and unique.
这座城市的文化异质性使其充满活力且独特。
B2 noun /ˌhez.ɪˈteɪ.ʃən/

Hesitation

犹豫; 疑虑
Meaning
the action of pausing or delaying; uncertainty or unwillingness to act
Example
After a moment of hesitation, she decided to accept the challenging job offer from the company.
经过片刻的犹豫后，她决定接受公司提出的挑战性工作机会。
A1 adjective /ˈhʌŋɡri/

Hungry

饥饿的
Meaning
feeling the need for food; having a strong desire or craving
Example
I am very hungry after working all day.
我工作了一整天后非常饿。
B2 adverb /hɪˈstɒrɪkli/

historically

历史上
Meaning
in a way that relates to history or past events
Example
Historically, this city was a major trade center.
历史上，这座城市曾是一个重要的贸易中心。
B2 adjective /ˌhaɪ ˈtɛk/

high-tech

高科技
Meaning
using or involving advanced technology.
Example
The company produces high-tech medical devices.
该公司生产高科技医疗设备。
C1 noun /ˈhɜː.mɪt/

Hermit

作为宗教修行生活在孤独中的人；远离社会的人
Meaning
a person living in solitude as a religious discipline; someone who withdraws from society
Example
The old hermit lived alone in a small cabin deep in the mountains, away from civilization.
这位年老的隐士住在山中的一间小屋里，远离文明。
B2 noun /ˈhaɪdrədʒən/

hydrogen

氢气
Meaning
a colorless, odorless, highly flammable gas that is the lightest and most abundant chemical element in the universe
Example
Hydrogen is used as a clean fuel in many energy systems.
氢气在许多能源系统中作为清洁燃料使用。
C1 phrase ˌhjuː.məˈnɪt.ər.i.kəˈtæs.trə.fi

humanitarian catastrophe

人道主义灾难
Meaning
A widespread disaster affecting human life, health, and well-being on a large scale.
Example
The war created a humanitarian catastrophe.
战争造成了人道主义灾难。
C1 noun /ˈhɔːr.nət/

Hornet

黄蜂
Meaning
a large wasp that can sting and is often aggressive
Example
The hornet built its nest under the roof.
黄蜂在屋顶下筑巢。
C1 noun/verb /ˈhɛmərɪdʒ/

hemorrhage

出血
Meaning
A significant loss of blood from a ruptured blood vessel, or to lose blood heavily.
Example
The patient suffered a severe brain hemorrhage.
患者遭受了严重的脑出血。
C1 adjective /ˌhæpi ɡoʊ ˈlʌki/

happy-go-lucky

无忧无虑的，轻松的，无忧的
Meaning
cheerfully unconcerned about the future; carefree
Example
She has a happy-go-lucky attitude and never worries about tomorrow.
她有着无忧无虑的态度，从不担心明天。
B2 verb /hæk/

hack

Meaning
to cut or chop roughly; to gain unauthorized access to a computer system
Example
The programmer managed to hack into the system.
B2 verb /ˈhezɪteɪt/

hesitate

犹豫
Meaning
to pause before acting; to be uncertain about what to do
Example
Don't hesitate to ask for help.
不要犹豫，随时寻求帮助。
B2 verb /həˈræs/

harass

骚扰
Meaning
to persistently annoy or torment someone
Example
The employees complained that their boss harassed them.
员工抱怨他们的老板骚扰了他们
A2 adjective /ˈhɛl.θi/

healthy

健康的
Meaning
Good physical and mental condition, free from disease or illness.
Example
Regular exercise and a balanced diet keep the body healthy.
规律的锻炼和均衡的饮食保持身体健康。
B1 noun ˌhjuː.mən ˈraɪts

human rights

人权
Meaning
A right that is believed to belong justifiably to every person.
Example
Human rights protect individual freedoms.
人权保护个人自由。
C2 noun /ˈhɜːrmɪtɪdʒ/

hermitage

隐居地
Meaning
A secluded residence or retreat, often for a hermit or religious recluse.
Example
The monk spent years in a hermitage deep in the forest.
那位和尚在森林深处的隐居地里度过了多年。