a big and sudden improvement
一次巨大的突然改善 (yī cì jù dà de tú rán gǎi shàn)
"This discovery is a quantum leap in medical research."
"这个发现是医学研究中的量子飞跃。" (zhè gè fā xiàn shì yī xué yán jiū zhōng de **liàng zǐ fēi yuè**.)
to form new friendships
to suddenly start talking about something unrelated
Don’t lose hope until the end.
to make exceptions; to modify rules slightly
to learn or become skilled at something new
to irritate or annoy someone without intending to
