我无法确定谁当时在场。

I'm not certain who was there.

《牛津词典》

仍无法确定他是否曾经较强地控制过真正的经济力量。

It is arguable whether he ever had much control over the real economic power.

《柯林斯英汉双解大词典》

我没有身份证件，所以警察无法确定我就是那辆车的主人。

I had no ID on me so the police couldn't establish that I was the owner of the car.

《柯林斯英汉双解大词典》

And he writes, for example, to Mary: "I am moreover undecided whether I ought to continue to hold slaves."

于是他便写给玛丽,比如这段,"我无法确定,我是否该继续拥有那些奴隶"

耶鲁公开课 - 美国内战与重建课程节选

And so it appears, the three conversations end, Book I ends with uncertainty about what justice is.

而这显露出在三段会话结束时，在第一册结束时,正义仍是无法确定的概念。

耶鲁公开课 - 政治哲学导论课程节选

It has to stay relevant to the market, so nobody really knows where these interest rates come from because no one person sets them.

交易价格必须与市场价格一致,因此没有人能确定,利率的决定过程,因为个人无法决定利率

耶鲁公开课 - 金融市场课程节选