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
You remember that day, Robbie?
你还记得那天吗 Robbie
He's behind the rest of the class in reading.
他在阅读方面不如班上的其他同学。
In my letter, I told her that she could stay with us.
我在信中告诉她，她可以和我们住在一起。