Know one's business
精通自己一行
🧩 词语组成解析
know
[no]
v. 知道;了解;认识;确信;
n. 知情;
a. 人们的；自己的
business
[ˈbɪznɪs]
n. 商业，交易;生意;事务，业务;职业，行业;
🗣️ 情景例句
I've got the council to agree
我已说服议会同意
You must go easier on yourself; you look exhausted.
你不可以太勉强，你的身体似乎太疲劳了。
Then he put his hand into pocket, and took out a phrasebook.
然后他把手伸进了衣袋，掏出了一本常用语手册。