Backbone chain
[化] 主链
🧩 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;
🗣️ 情景例句
How about $ 140 per case?
每箱140美元怎么样？
A hot bath makes all the difference in the morning.
上午洗个热水澡能让人精神振奋。
You forget that I was a medical student once upon a time.'
你忘了我以前是学医的了。”