Roller chain
[机] 滚子链
🧩 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're in great condition.
你状态挺好的。
I'm twenty-two (years old).
我二十二了。
Excuse me. Is there a post office near here?
请问，附近有邮局吗？