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 long does it take you to get through a letter?
你写一封信要花多少时间？
Better be half hanged than ill wed.
与其成怨偶，不如守单身。
'Oh, that,' he said with a smile as if he were talking about an old friend.
“噢，是它呀！他笑着说道，俨然在谈论一位老朋友。