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'd like to give her a nice going-away present.
我很想送给她一件好的离别礼物。
It's not too heavy,but I don't know the exact weight.
它不是太重的，但是我不知道准确的重量。
One of the real pluses of this product is that it is of very high quality and of compact size.
这种产品的真正优点之一就是高质量和小体积。