我们需要了解事情发生的确切时间。

We need to know the exact time the incident occurred.

《牛津词典》

现在，科学家们已经找到了这些记忆消失的确切时间。

Now scientists have found exactly when these memories disappeared.

youdao

这记录不知道确切时间的未来事件。

This records a future event where you do not know the actual time with certainty.

youdao

Milton's taking pains here, and he does this with very few other poems, to let us know precisely when it is that he's written it.

弥尔顿在这里极力想让我们，知道他确切的创作时间。

耶鲁公开课 - 弥尔顿课程节选

But you shouldn't take the date that I give you, the traditional date, as being firm.

但是我所提供给你的日期历史久远,并不能当做确切的时间加以使用

耶鲁公开课 - 古希腊历史简介课程节选

Well, maybe the answer is there's no particular time at all when I killed him But for all that, it's true that I killed him ? What makes it true that I killed him?

也许答案是,我什么时候杀死他根本没有确切的时间,尽管如此，我杀死他是真的,为什么我杀死他是真的？

耶鲁公开课 - 死亡课程节选