我很确定他们结婚前就睡在一起。

I'm pretty sure they slept together before they were married.

《柯林斯英汉双解大词典》

那是一段非常不确定的时期。

It was a time of terrible uncertainty.

《柯林斯英汉双解大词典》

我听到一些流言，但都不确定。

I've heard rumours, but nothing definite.

《牛津词典》

So it took a long time for the twenty books that we have to get settled on. And we'll talk about how that actually happened,also,still.

所以很长一段时间之后那27本书,才最终被确定下来，我们会谈及,那是如何实现的。

耶鲁公开课 - 新约课程节选

Whether Gadamer means that when he speaks of gap or whether he simply means an abyss or a distance to be crossed I couldn't say.

当葛达玛说到间隙时是那个意思,还是仅仅认为它是需要跨越的一个深渊或者一段距离,我不能确定。

耶鲁公开课 - 文学理论导论课程节选

I just want to make mention of this in case there's ever doubt, generally parentheses do solve your problem as an arithmetic but do realize this is some lower level details we'll come back to over time.

是想告诉大家如果你对某些式子的前后运算关系不确定，就加上括号,这都是一些小细节,我们以后还是会再提到的。

哈佛公开课 - 计算机科学课程节选