你能确定你已经记下了你车里的每一个存放零食的地方，或者你桌子上的每一把坚果了吗？

Can you be sure you've noted every snack bar in your car, or every handful of nuts at your desk?

youdao

那个美容院的事情你能确定吗？

You sure about this beauty parlor thing?

youdao

你能确定这化石的确切年代吗？

Can you date the fossil exactly?

youdao

So by using the tabulated data, we can really determined heats of formation for most reactions that you might contemplate, OK?

所以，使用这些表格,我们就能确定大多数,你可能碰到的反应的生成热？

麻省理工公开课 - 热力学与动力学课程节选

Or perhaps, you could be trying to explain that you don't know whether you can do something or not by a certain date.

又或者，你正在试图解释你没法确定你是否能在一个指定日期前做完某件事。

I don't know 课堂 - SpeakingMax英语口语达人

You can't take the exam unless you're registered for the class, and we need to make sure we can verify that.

否则你是不能参加这次考试的,除非你注册了这门课，而我们需要确定你能证实这一点。

麻省理工公开课 - 化学原理课程节选