他们不知道怎么做生意。

They don't know how to run a business.

youdao

我的儿子大学刚毕业，可是他却不断地来告诉我应该怎么做生意。

My son, fresh out of college, keeps telling me how to run my business.

youdao

我三十年来生意做得很好，赚了不少钱。所以，他来告诉我怎么做生意简直是多余的。

But I've been making good money for 30 years so he's teaching a fish how to swim.

youdao