Find out, enquire, use your brain, doubt, question.

找出答案，质询，使用自己的头脑，怀疑，提出问题。

youdao

Jurors only need to have a "reasonable doubt" a reasonable question in their mind that the person is guilty as charged.

VOA: special.2009.08.31

And there's another question which you would no doubt be concerned to discuss, namely what would such Socratically purified ? music and poetry look like?

而另一个,你们一定会想要讨论的问题是，何谓经苏格拉底纯化过的,音乐与诗学形式？

耶鲁公开课 - 政治哲学导论课程节选

"The more banal he is, the more terrifying he is. There is no doubt and I'll say without question that it was the most difficult thing I've ever done as an actor."

VOA: standard.2010.01.08

Skeptics express doubt and question everything.

FORBES: Everyone Needs a Little Rat-Like Cunning

But there is no doubt, no question, that they do not address the urgent need for near-term economic growth and job creation.

WHITEHOUSE: The White House

Without a doubt: the only question is how quickly.

FORBES: How a Business Dies