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 reminded him to work hand.
我提醒他要用功。
Why are you so happy?
你为什么这样快乐？
It is said that if anyone touches the tree, he will have bad luck; if he picks a leaf, he will die.
据说，谁要是触摸了这棵树，谁就会交上恶运；如果谁摘了一片树叶，谁就会死去。