如他之前的许多政客一样，本特利先生不知道如何把握分寸。

Like many politicians before him, Mr. Bentley did not know when to stop.

《柯林斯英汉双解大词典》

此时的赛赛曼先生不知道是醒着还是在做梦。

Mr. Sesemann at this moment did not know if he was awake or dreaming.

youdao

交易完成了。阿扎先生说：“我不知道其中的原理，但是就是行得通。”这是他从另外一名员工那里学来的小窍门。

The sale was completed. "I don't know how it works. It just does." said Mr. Azar who learned the trick from another clerk.

youdao

Mr. Carl Icahn: Well, it's hard to recommend how to invest at this time without knowing how much capital you have.

伊坎先生：嗯，在当今形势下,如果不知道你有多少资本,那就很难给你投资建议。

耶鲁公开课 - 金融市场课程节选