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 frankly don't know what to do about it.
我真不知道该怎么解决。
Hungry dogs will eat dirty puddings.
饥不择食。
Yes, it is. You need to wear warmer clothes.
是啊，你应该穿得更暖和些。