"know every trick in the book" in Chinese (Simplified)

门儿清无所不知（花招）精通一切诀窍

Definition

非常有经验和技巧，精通所有方法、花招或策略，通常指很难被蒙骗的人。

属于非正式表达，带有钦佩或谨慎的色彩，常指对方非常难以被欺骗，多用于商业、谈判或人生经验场合。

My grandfather knows every trick in the book when it comes to fixing cars.

我爷爷修车时**门儿清**。

She knows every trick in the book to win an argument.

她为了赢辩论**无所不知（花招）**。

If you want to succeed, you need to know every trick in the book.

想要成功，你得**精通一切诀窍**。

Trust me, he knows every trick in the book—you won't outsmart him.

相信我，他**门儿清**，你可骗不了他。

Salespeople know every trick in the book to get you to buy something you don't need.

推销员**无所不知（花招）**，总能让你买不需要的东西。

After all these years in the business, she knows every trick in the book.

做了这么多年，她已经**门儿清**了。