seminal
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C1 adjective /ˈsɛm.ɪ.nəl/

seminal

幸福
Meaning
Strongly influencing later developments; highly original and influential.
Example
His seminal book changed the course of modern philosophy.
她在获得奖项时无法掩饰自己的幸福。
C2 noun /ˈsɒlɪˌsɪzəm/

solecism

语法错误
Meaning
a grammatical mistake in speech or writing; a breach of good manners or etiquette
Example
His speech was full of solecisms and awkward phrases.
他的演讲充满了语法错误和笨拙的短语。
B2 noun /ˈskɒl.ər/

Scholar

学者；学术人员
Meaning
a person who has studied a subject for a long time and knows a lot about it; an academic
Example
The renowned scholar published several books on ancient history.
著名学者出版了几本关于古代历史的书籍。
C2 verb /ˈsɪmpər/

simper

傻笑或做作的笑
Meaning
to smile in a silly, self-conscious, or affected way
Example
She simpered at his compliment, clearly embarrassed.
她在他的夸奖下傻笑，显然感到尴尬。
C1 noun /ˈʃæmbəlz/

shambles

一片混乱
Meaning
a state of complete disorder or ruin
Example
After the storm, the whole town was in shambles.
风暴过后，整个城镇陷入了一片混乱。
B1 adjective /ˈsætɪsfaɪd/

satisfied

满意
Meaning
Pleased or content with what has been achieved or received.
Example
He felt satisfied after finishing his project.
完成项目后，他感到满意。
A2 noun /stɔːrm/

Storm

风暴
Meaning
a violent weather condition with strong winds, rain, thunder, and lightning
Example
The storm caused power outages across the city.
风暴导致全市断电。
A2 adjective /ˈsʌðərn/

southern

南方的
Meaning
located in or facing the south; southern regions
Example
She moved to a southern city for work.
她为了工作搬到了一个南方城市。
B2 noun /swiːt/

suite

套房
Meaning
a set of rooms designated for one person's or family's use or for a particular purpose
Example
They stayed in the presidential suite at the hotel.
他们住在酒店的总统套房里。
C1 noun /ˈskaɪ.lɑːrk/

Sky-Lark

云雀
Meaning
a small brown bird known for singing while flying high in the sky
Example
The skylark sang beautifully as it soared above the meadow.
当云雀飞翔在草地上方时，它美丽地歌唱。
B2 noun ˈʃeɪdɪd ˈɛəriə

shaded area

遮阳区
Meaning
An area that is protected from direct sunlight.
Example
We sat in a shaded area by the riverbank.
我们坐在河岸的遮阳区。
B1 noun, verb /stɒk/

stock

库存
Meaning
a supply of goods kept for sale or use; to keep or fill with goods
Example
The shop stocks a wide variety of products.
商店储存大量的商品。
C2 verb /səˈfjuːz/

suffuse

弥漫
Meaning
to gradually spread through or over something
Example
A warm glow suffused her face as she smiled.
当她微笑时，一种温暖的光辉弥漫到她的脸上。
C1 adjective /ˈstɛlər/

stellar

卓越
Meaning
Relating to stars; outstanding or excellent.
Example
She gave a stellar performance in the play.
她在话剧中的表现非常卓越。
B2 adjective /ˈstɑːrtəld/

startled

吃惊
Meaning
suddenly shocked or surprised by something unexpected
Example
She was startled by the loud noise outside.
她因外面的巨大声音而感到吃惊。
C1 adjective /səˈsɛp.tə.bəl/

susceptible

容易受某种特定事物影响或损害的
Meaning
Likely or liable to be influenced or harmed by a particular thing.
Example
Children are more susceptible to infections.
孩子们更容易感染。
C2 noun /ˈsɪnjuː/

sinew

肌腱
Meaning
A tendon; figuratively, the source of strength, power, or resilience.
Example
The sinews in his arms stood out as he lifted the heavy box.
当他举起沉重的箱子时，他手臂上的肌腱明显凸出。
B2 verb /ˈʃætər/

shatter

打碎
Meaning
To break suddenly into many small pieces.
Example
The glass will shatter if you drop it.
玻璃会碎掉，如果你把它摔下去。
C1 adjective /ˈsɪlkən/

Silken

丝绸的; 柔软的; 光滑的;
Meaning
made of silk; smooth and soft like silk
Example
She wore a beautiful silken dress to the party.
她穿了一件漂亮的丝绸裙子去参加聚会。
A2 noun /skwɛə(r)/

square

正方形
Meaning
a shape with four equal straight sides and four right angles
Example
The table has a square shape.
桌子是正方形的。
A2 noun /stoʊn/

stone

石头
Meaning
a hard, naturally occurring mineral material found in the earth
Example
He threw a stone into the lake.
他把一块石头扔进湖里。
A2 adjective /ˈsep.ər.ət/

Separate

分开; 独立; 单独; 分离
Meaning
distinct; not connected; individual; apart
Example
Please keep your personal and professional lives separate.
请保持您的个人和职业生活分开。
C1 noun /ˈstɛə.rɪ.əʊˌtaɪ.pɪŋ/

stereotyping

刻板印象
Meaning
A widely held but fixed and oversimplified image or idea of a particular type of person or thing.
Example
Stereotyping people based on their race is harmful.
基于种族的刻板印象是有害的。
B2 noun /ˈsɑːfmɔːr/

sophomore

大二学生
Meaning
a student in their second year of study at a university or high school
Example
He’s a sophomore in college, studying computer science.
他是大学的二年级学生，学习计算机科学。
B2 verb /siːz/

seize

夺取
Meaning
To take hold of suddenly and forcibly.
Example
The police managed to seize the stolen goods.
警察成功没收了被盗的货物。
C2 noun ˈsɒmnələns

somnolence

嗜睡
Meaning
A state of drowsiness or sleepiness; inclination to sleep.
Example
The somnolence after a heavy meal made it hard to concentrate.
一顿重餐后的嗜睡让人难以集中注意力。
B2 noun sɛlf rɪˈlaɪ.əns

self-reliance

自给自足
Meaning
Reliance on one's own powers and resources rather than those of others; independence.
Example
Self-reliance helps build confidence.
自给自足帮助建立自信。
B1 noun, verb /spoʊk/

spoke

辐条 / 说
Meaning
As a noun, a bar connecting the center of a wheel to its rim; as the past tense of 'speak'.
Example
The bicycle's spoke was bent after the accident.
自行车的辐条在事故后弯曲了。
B2 adverb /ˈstrɪktli/

strictly

严格
Meaning
in a way that follows rules or limits completely
Example
Smoking is strictly prohibited inside the building.
在大楼内吸烟是严格禁止的。
C2 noun /ˈslæt.ən/

slattern

邋遢的女人
Meaning
a woman who is untidy or slovenly in appearance or habits
Example
The house looked as if a slattern lived there.
这所房子看起来像是一个邋遢的女人住在那里。
B2 verb /slæʃ/

slash

切割
Meaning
to cut with a sharp blade; to reduce drastically
Example
The company slashed prices to attract more customers.
公司大幅削减价格以吸引更多顾客。
B2 noun ˈʃɔːtkʌmɪŋz

shortcomings

短处
Meaning
A fault or failure to meet a certain standard; deficiencies.
Example
Institutional shortcomings affect student behavior negatively.
制度性短处对学生行为产生了负面影响。
C1 noun /ˈsɔːjər/

Sawyer

锯木工
Meaning
a person who saws wood, especially as an occupation
Example
The skilled sawyer cut the logs into planks.
熟练的锯木工将原木锯成木板。
B1 noun /ˈsæl.ər.i/

Salary

薪水
Meaning
a fixed regular payment, typically paid on a monthly basis
Example
She receives a good salary for her work as a teacher.
她作为教师的工作，得到了很好的薪水。
C2 adjective /ˈsteɪ.dʒi/

stagy

过于戏剧化
Meaning
Overly theatrical, artificial, or exaggerated in manner or style.
Example
Her performance felt stagy and unnatural.
她的表演显得过于戏剧化和不自然。
C1 verb /skʌf/

scuff

擦伤
Meaning
to mark or scratch the surface of something by rubbing
Example
He scuffed his shoes on the pavement.
他在人行道上擦伤了他的鞋子。
C1 noun /ˌspɒn.təˈneɪ.ɪ.ti/

spontaneity

自发性
Meaning
The quality of being spontaneous; natural and unplanned behavior.
Example
His spontaneity makes him a great conversationalist.
他的自发性使他成为一个很棒的对话者。
C1 adjective /ˈseɪlaɪn/

Saline

盐水的; 含盐的
Meaning
containing salt; salty; relating to salt water
Example
The saline solution is used for medical treatments.
盐水溶液用于医学治疗。
C2 adjective /ˌsuːdəˈrɪfɪk/

sudorific

促汗的
Meaning
causing or increasing sweating
Example
The doctor prescribed a sudorific drug to help reduce the fever.
医生开了一种促进出汗的药物来帮助减少发热。
C2 verb /ˈsʌn.dər/

sunder

分裂
Meaning
To split apart or separate, especially with force.
Example
The war sundered families and friends.
战争使家庭和朋友分裂。
C2 noun /sɪnˈtɪl.ə/

scintilla

小小的火花
Meaning
A tiny trace or spark of a specified quality or feeling.
Example
There wasn’t a scintilla of doubt in her mind.
她的脑海中没有一丝疑虑。
C1 verb /ˈskævɪndʒ/

scavenge

在垃圾中寻找
Meaning
to search through waste or discarded material to find useful items
Example
The children scavenged for food in the garbage dump.
孩子们在垃圾堆里找食物。
B2 adjective /ʃɪər/

Sheer

完全的; 绝对的; 透明的; 非常陡峭
Meaning
complete; absolute; transparent; very steep
Example
It was sheer luck that we found the place.
这是纯粹的运气，我们找到了这个地方。
A2 noun /ˈsɒftweə/

software

软件
Meaning
the programs and other operating information used by a computer
Example
He installed the software to enhance the performance of his computer.
他安装了软件以提高计算机的性能。
B2 noun /ˈsɛsəmi sidz/

Sesame Seeds

芝麻种子
Meaning
small edible seeds from the sesame plant used in cooking and baking
Example
Sprinkle sesame seeds on top of the bread before baking.
在面包上撒上芝麻种子，然后烘烤。
B1 noun /ˈsɜr.fɪs/

Surface

表面; 上层
Meaning
the outside part or uppermost layer of something
Example
The submarine emerged to the surface of the ocean.
潜水艇浮出海面。
C1 adjective /ˈspɑːrtn/

spartan

斯巴达式
Meaning
showing simplicity and lack of luxury; austere
Example
He lived in a spartan room with just a bed and a chair.
他住在一个斯巴达式的房间里，只有一张床和一把椅子。
C1 verb ˈsɪn.θə.saɪ.zɪŋ

synthesizing

合成, 结合, 以一致的方式呈现
Meaning
Combine (a number of things) into a coherent whole.
Example
He excels in synthesizing ideas from different sources.
他擅长将不同来源的想法进行合成。
B1 noun /ˈsteɪtəs/

status

状态
Meaning
the social or professional position or condition of someone or something
Example
His social status improved after the promotion.
他的社会地位在晋升后得到了改善。
A1 noun /ˈsætərdeɪ/

saturday

星期六
Meaning
The day of the week between Friday and Sunday; traditionally the sixth day of the week
Example
We are going to the beach on Saturday.
我们星期六去海滩。
C1 noun /ˈsaɪd.laɪn dɪˈskʌʃənz/

sideline discussions

边缘讨论
Meaning
Informal or secondary conversations that occur outside the main agenda of a formal meeting.
Example
Sideline discussions often lead to agreements.
边缘讨论常常导致协议。
C1 noun /skɪt/

skit

小品
Meaning
a short, humorous performance or piece of writing
Example
The students performed a funny skit at the event.
学生们在活动中表演了一个有趣的小品。
C1 adjective /sɪˈkluːdɪd/

secluded

隐蔽的
Meaning
Placed apart from other people or things; private and quiet.
Example
They spent their vacation in a secluded beach house.
他们在一个隐蔽的海滩小屋度过了假期。
B2 adjective /ˈspɒtɪd/

Spotted

斑点的; 有标记的; 被看到
Meaning
having spots or marks; noticed or seen
Example
The spotted leopard moved silently through the jungle.
斑点猎豹静静地穿过丛林。
B2 adjective /spɒnˈteɪniəs/

Spontaneous

自发的
Meaning
done without planning; natural and unforced
Example
Their spontaneous dance in the rain was beautiful.
他们在雨中即兴的舞蹈非常美丽。
A2 noun /ˈseɪf.ti/

Safety

安全
Meaning
condition of being protected from danger, risk, or injury
Example
The company prioritizes workplace safety above all else.
公司将工作场所的安全置于一切之上。
C2 verb /ˈskærɪfaɪ/

scarify

松土
Meaning
to make shallow cuts or scratches; to loosen the surface of soil
Example
The farmer scarified the soil before planting seeds.
农民在种植种子之前松土。
B2 adjective /ˈstraɪkɪŋ/

striking

引人注目
Meaning
very noticeable or impressive in appearance or effect
Example
Her striking beauty caught everyone's attention.
她那引人注目的美丽吸引了所有人的注意。
C1 verb /ʃraʊd/

shroud

覆盖
Meaning
to cover or hide; to wrap in cloth
Example
The mountain peak was shrouded in mist.
山顶被雾气笼罩。
C1 noun /ˌsɛlfsəˈfɪʃənsi/

Self-sufficiency

自给自足
Meaning
the ability to supply one's own needs without external assistance; independence
Example
The farm achieved complete self-sufficiency in food production.
农场在食品生产中实现了完全的自给自足。
A1 noun /ʃɜːrt/

Shirt

衬衫
Meaning
a piece of clothing worn on the upper body with sleeves and buttons
Example
He wore a white shirt to the office.
他穿了一件白衬衫去办公室。
B2 adjective /ˈspeɪ.ʃəs/

Spacious

宽敞的；宽阔的
Meaning
having a lot of space; roomy and comfortable
Example
The house has a spacious living room with high ceilings.
这座房子有一个宽敞的客厅，高高的天花板。
B2 noun /ˈsleɪvəri/

slavery

Meaning
the system or state of being owned and forced to work for someone else
Example
Slavery was abolished in most countries in the 19th century.
C1 verb /ˌsuːpərɪmˈpoʊz/

superimpose

叠加
Meaning
to place one thing on top of another so that both can be seen
Example
The editor superimposed text over the image.
编辑将文本叠加在图片上。
C2 noun /ˈsɪbɪləns/

sibilance

嘶嘶声
Meaning
A hissing or hushing sound, especially in speech with 's' or 'sh'.
Example
The poet used sibilance to create a soft, hissing effect in the verse.
诗人用西比兰斯在诗句中创造了一个柔和的嘶嘶效果。
C2 noun /ˈsɪlvər kɑrp/

Silver carp

银鲤
Meaning
a large freshwater fish with silvery scales, commonly farmed for food
Example
Silver carp is widely cultivated in fish farms across Asia.
银鲤在亚洲的鱼场中被广泛养殖。
C1 noun ˌskeɪ.ləˈbɪl.ə.ti

scalability

可扩展性
Meaning
The capacity to be changed in size or scale; the ability of a system to handle a growing amount of work.
Example
The new software offers high scalability for large enterprises.
新的软件为大型企业提供了高可扩展性。
A2 noun /ˈsɛlər/

seller

幸福
Meaning
a person who sells something
Example
The seller offered a discount on bulk purchases.
当她收到奖项时，她无法掩饰自己的幸福。
C2 noun /slaɪt/

sleight

技巧
Meaning
Skill or dexterity, especially in performing tricks.
Example
The magician amazed the crowd with his sleight of hand.
魔术师用他的技巧惊艳了观众。
B2 noun /ˈspɛʃəlti/

specialty

专长
Meaning
a particular area of study, work, or interest; something in which a person or place excels
Example
Her specialty is pediatric medicine.
她的专业是儿科医学。
B2 verb /sɑːb/

sob

大声哭泣
Meaning
to cry noisily while taking short breaths
Example
She began to sob uncontrollably after hearing the news.
她在听到消息后开始无法控制地呜咽。
C1 adjective /sɪmˈfɒnɪk/

symphonic

交响乐的
Meaning
relating to or having the character of a symphony or symphony orchestra
Example
The concert featured a symphonic masterpiece.
音乐会展示了一部交响乐的杰作。
B2 noun /ˈspəʊkspɜːrsən/

spokesperson

发言人
Meaning
a person who speaks on behalf of others or an organization
Example
The spokesperson addressed the press conference on behalf of the company.
发言人代表公司在新闻发布会上发言。
C1 noun /ˌsɛrənˈdɪpɪti/

serendipity

意外的好运
Meaning
The occurrence of events by chance in a happy or beneficial way.
Example
Finding that old photo album was pure serendipity.
找到那本旧照片集是纯粹的意外的好运。
C1 noun /ˈsæf.aɪər/

Saphire

蓝宝石
Meaning
a precious stone that is typically blue in color
Example
The royal crown was adorned with a large sapphire.
皇家王冠上镶嵌着一颗大蓝宝石。
C1 adjective /ˈsʌmp.tʃu.əs/

sumptuous

奢华的
Meaning
Splendid and expensive-looking; luxurious.
Example
The guests were treated to a sumptuous banquet.
客人们被招待了一场奢华的宴会。
C2 adjective /ˈsɪlvən/

sylvan

林地的
Meaning
Relating to or characteristic of the woods or forest.
Example
The cottage was set in a sylvan landscape full of tall trees.
这座小屋位于一个林地的景观中，充满了高大的树木。
C1 adjective /ˈstɔːlwərt/

stalwart

坚定, 忠诚
Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
她一直是社区的坚定支持者。
C1 adjective /səkˈsɪŋkt/

succinct

简洁
Meaning
Briefly and clearly expressed; characterized by clear, precise expression in few words.
Example
His speech was succinct and impactful.
他的演讲简洁且有影响力。
A2 adverb /ˈsʌm.taɪm/

sometime

某个时候
Meaning
at a time that is not known or stated; occasionally
Example
Let's meet for coffee sometime next week.
我们下周某个时候见面喝咖啡吧。
A2 noun /staɪl/

Style

风格
Meaning
a particular way of doing something; a distinctive appearance or manner of expression
Example
She has her own unique style of writing that captivates readers.
她有自己独特的写作风格，吸引了读者。
C2 verb /ˈseɪʃiˌeɪt/

satiate

满足
Meaning
To satisfy fully, especially with food or desire.
Example
The large meal satiated his hunger.
丰盛的餐食满足了他的饥饿。
C1 noun /ˈʃrɪŋkɪdʒ/

shrinkage

收缩
Meaning
The process of becoming smaller in size, amount, or value.
Example
The company reported a shrinkage in profits this quarter.
公司报告了本季度利润的收缩。
C1 adjective /ˈsɛn.sər.i/

sensory

感官的
Meaning
Related to the five human senses (sight, hearing, taste, touch, smell).
Example
Sensory feedback enhances the VR experience.
感官反馈增强了虚拟现实体验。
B2 noun /ˌsɪmjuˈleɪʃən/

simulation

模拟
Meaning
the imitation of a situation or process
Example
The simulation helped the students understand the complex theory.
模拟帮助学生理解复杂的理论。
B2 noun /ˈsikwəns/

Sequence

序列
Meaning
a particular order in which related events, movements, or things follow each other; a set of related events, movements, or things that follow each other in a particular order
Example
The dance sequence was perfectly choreographed.
舞蹈序列被完美地编排。
B2 verb /ˈsɒfən/

soften

使变软
Meaning
to make or become less hard, severe, or strong.
Example
Heat will soften the butter quickly.
热量会很快使黄油变软。
A1 verb /stænd/

stand

站立
Meaning
to be in an upright position; to tolerate or endure
Example
Please stand up when the teacher enters.
当老师进来时请站起来。
C1 noun /ˈsɪndɪkət/

syndicate

辛迪加
Meaning
A group of individuals or organizations combined to promote a common interest or carry out a business venture.
Example
A syndicate of investors bought the struggling company.
一个投资者辛迪加买下了这家困难的公司。
C2 verb /ˈsʌbdʒʊˌɡeɪt/

subjugate

征服
Meaning
To bring under domination or control, especially by conquest.
Example
The empire sought to subjugate the neighboring kingdoms.
帝国试图征服邻国。
C1 verb /ˈsɪmjʊˌleɪt/

simulate

模拟
Meaning
to imitate the appearance, character, or behavior of something; to pretend or reproduce conditions artificially
Example
The pilot had to simulate an emergency landing during training.
飞行员在训练中必须模拟紧急着陆。
C2 verb /stɑːntʃ/

stanch

止血
Meaning
to stop the flow of blood or liquid from a wound or source
Example
The nurse quickly stanched the bleeding from the cut.
护士迅速止住了切口处的出血。
A2 noun /ˈsɒkər/

soccer

足球
Meaning
a sport in which two teams of eleven players each try to score goals by kicking a ball into the opposing goal
Example
He loves to play soccer with his friends.
他喜欢和朋友们一起踢足球。
B2 noun /sɪˈver.ə.ti/

Severity

严重性; 严厉; 强度
Meaning
the quality of being extremely serious or harsh; intensity of something bad
Example
The severity of the storm caused widespread damage across the city.
风暴的严重性在整个城市造成了广泛的破坏。
B2 adjective /ˈstɜːrdi/

sturdy

坚固
Meaning
strongly and solidly built; not easily weakened
Example
The carpenter made a sturdy wooden table.
木匠做了一张坚固的木桌。
B2 noun ˈsɪblɪŋz

Siblings

兄弟姐妹
Meaning
Each of two or more children or offspring having one or both parents in common.
Example
Siblings are usually placed on the same level in a family tree.
兄弟姐妹通常在家谱中处于同一水平。
C2 verb, adjective /ˈstraɪeɪt/

striate

条纹
Meaning
to mark with stripes or grooves; striped or streaked in appearance
Example
The rock surface was striated by glacial movement.
岩石表面因冰川运动而被划出条纹。
C1 noun /ˈspɛkjʊˌleɪtər/

speculator

投机者
Meaning
A person who forms theories without evidence, or invests in assets hoping for profit.
Example
The real estate speculator bought land hoping its value would rise.
房地产投机者购买了土地，希望其价值会增加。
C1 verb /sərˈmaʊnt/

surmount

克服
Meaning
to overcome a difficulty or obstacle
Example
He surmounted all the challenges to achieve his dream.
他克服了所有的挑战，实现了自己的梦想。
B1 noun /səˈdʒes.tʃən/

Suggestion

建议; 建议
Meaning
an idea or plan put forward for consideration; advice or recommendation
Example
Do you have any suggestions for improving our team's productivity?
你有什么建议可以提高我们团队的生产力吗？
C2 adjective /ˌsuːpərˈnuːmərɛri/

supernumerary

额外的
Meaning
Exceeding the usual number; extra or unnecessary.
Example
The play included several supernumerary actors to fill the background scenes.
这出戏包含了几个额外的演员来填充背景场景。
B1 adjective /ˈsɔːlti/

Salty

咸的
Meaning
having the taste of salt; containing salt; tasting of seawater
Example
The salty ocean water made her thirsty.
咸海水让她口渴。
B1 verb/adjective /sɪˈkjʊər/

secure

确保
Meaning
to make safe or protect; to fix something firmly in place
Example
Please secure the door before you leave.
请在离开前确保门锁好。
C1 noun /səˈrɛn.ɪ.ti/

serenity

宁静
Meaning
The state of being calm, peaceful, and untroubled.
Example
Meditation helps in achieving inner serenity.
冥想有助于实现内心的平静。
C2 noun /ˈspɒt.ɪd sneɪk hed/

Spotted snake head

斑点蛇头鱼
Meaning
a type of freshwater fish with spotted markings and an elongated head resembling a snake
Example
The spotted snake head is a popular fish for aquaculture in South Asia.
斑点蛇头鱼是南亚水产养殖中常见的鱼类。
B2 noun/verb /ˈsæd.əl/

saddle

马鞍; 使某人承担责任
Meaning
A seat fastened on the back of a horse for riding; to burden someone with a responsibility.
Example
He saddled the horse before going for a ride.
他在骑马之前给马鞍上鞍。
C2 verb /sɪˈkwɛstreɪt/

sequestrate

查封
Meaning
To take legal possession of assets until a debt is paid or disputes are resolved.
Example
The court decided to sequestrate the company's property.
法院决定查封公司的财产。
B2 noun /ˈsiː.krə.si/

Secrecy

保密
Meaning
the practice of keeping something secret; the state of being kept hidden
Example
The project was conducted in complete secrecy.
该项目是在完全保密的情况下进行的。
B1 noun ˈstrʌɡ.əl

struggle

斗争
Meaning
A forceful or violent effort to get free of restraint or resist attack; a determined effort under difficult circumstances.
Example
The struggle for independence united the nation.
独立斗争使国家团结。
C2 verb /skʌlk/

skulk

Meaning
to move or hide secretly, often because you are planning something bad or are feeling guilty
Example
He tried to skulk in the shadows to avoid being seen.
B2 verb /ʃɛd/

shed

掉落
Meaning
to let something fall off naturally, such as leaves, hair, or tears
Example
Trees shed their leaves in autumn.
树木在秋天落叶。
B2 noun /ˌspɛsɪfɪˈkeɪʃən/

specification

规格
Meaning
a detailed description or assessment of something
Example
The product specification includes all the necessary details.
产品规格包括所有必要的细节。
C2 noun /ʃiːf/

sheaf

麦束
Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
农民肩上背着一捆小麦。
A1 noun /ˈsekənd/

second

Meaning
a unit of time equal to one sixtieth of a minute; also the position after first
Example
He finished the race in second place.
C1 verb /səˈlɪsɪt/

solicit

请求
Meaning
to ask for or try to obtain something from someone
Example
The charity is soliciting donations for flood victims.
慈善机构正在为洪水灾民募捐。
C1 noun /ˈsɛpərətɪst/

separatist

分裂主义者
Meaning
A person who supports the separation of a group from a larger body, often for political or cultural independence.
Example
The separatist group demanded independence from the central government.
分裂主义者要求中央政府独立。
C1 verb /səˈlɪdəˌfaɪ/

solidify

巩固
Meaning
To make something firm, strong, or more certain.
Example
The company solidified its position in the market.
公司巩固了其在市场中的地位。
C1 noun /səˈlaɪ.və/

Saliva

唾液
Meaning
the watery liquid secreted into the mouth by glands
Example
The dentist asked her to rinse the saliva from her mouth.
牙医让她把口腔里的唾液漱掉。
C2 adjective ˌsʌr.əpˈtɪʃ.əs

surreptitious

秘密
Meaning
Kept secret, especially because it would not be approved of; done stealthily.
Example
She took a surreptitious glance at his notes.
她偷偷地看了一眼他的笔记。
C2 adjective /ˈsɛrid/

serried

紧密排列
Meaning
pressed or crowded together, often in rows or ranks
Example
The soldiers stood in serried ranks, ready for inspection.
士兵们站在紧密排列的队列中，准备接受检查。
C1 noun ˌsætʃəˈreɪʃən

saturation

饱和
Meaning
The state of being saturated; the degree or extent to which something is dissolved or absorbed
Example
The saturation of the market with similar products reduced sales.
市场上的类似产品饱和度降低了销售额。