Chain substitution
[化] 链上取代
🧩 词语组成解析
chain
[tʃen]
n. 链子，链条;连锁，连续;拘束;连锁店或旅馆系列的事物;
vt. 用铁链锁住;监禁，束缚;
substitution
[ˌsʌbsti'tju:ʃən]
n. 代替;代用;替换;<化>取代（作用）;
🗣️ 情景例句
He made up with his girlfriend.
他和女朋友和好了。
Excuse me? I didn't hear what you said.
对不起，我没有听清你说的话。
George studied medicine in his youth.
乔治年轻时学过医，