很难确切知道你将在哪里，将做何事。

It's difficult to know exactly where you will be and what you will be doing.

youdao

“没有人确切知道。”玛莎说。

"Nobody knows for sure and certain," said Martha.

youdao

没有人确切知道这段友谊是如何开始的。

No one is quite sure how the friendship first began.

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

you know exactly what's going into the program.

你知道程序确切是什么样的。

什么是认知科学？ - SpeakingMax英语口语达人

We'll also post an exam from a previous year so you can actually see exactly what the format's going to look like.

我们还会提供一张往年的试卷,这样你就可以确切地知道,考卷的形式。

麻省理工公开课 - 化学原理课程节选