老人时常对鱼望望，好确定真有这么回事。

The old man looked at the fish constantly to make sure it was true.

youdao

当然可以，职业好确定你会清理地上的狗屎。

Of course, you can, Just make sure you will not leave your dogs's shit on the ground.

youdao

他们就坐在满是灰尘和树枝的地上聊天，其中一人会时不时地从窟窿里往外撇上一眼，好确定没有人前来。

They sat talking for hours on the dusty, twig-littered floor, one or other of them getting up from time to time to cast a glance through the arrowslits and make sure that no one was coming.

youdao

All right. So let's look at some of these wave functions and make sure that we know how to name all of them in terms of orbitals and not just in terms of their numbers.

好，让我们来看一下,这些波函数,并确定我们都知道,怎么用轨道,而不仅是量子数来命名它们,一旦我们可以命名它们。

麻省理工公开课 - 化学原理课程节选

Well, I don't know: it's not about winning and losing.

好吧,我不确定这是不是关乎输赢

耶鲁公开课 - 博弈论课程节选

I'm not sure if it's altogether true, but it's a good story, at least, about the famous German philosopher who said that on his first teaching of the Republic, he went through the whole book, ! taught the whole book in one seminar, one semester.

不确定是否都对，但是讲得很好，至少，讲者是著名德国哲学家,他在首堂讲授《理想国》的课中如此提问，然后教完整本巨著，整本巨著在一个学期内教完，一个学期。

耶鲁公开课 - 政治哲学导论课程节选