You always want to check your signs at the and because it's so easy to get the sign wrong, and I was hoping that it was right here because I wasn't sure, but it turned out to be right.

我们完成计算时，一定要记得检查符号,因为很容易弄错符号，刚才我就不太确定,是否弄错了符号，检查发现没有问题。

麻省理工公开课 - 热力学与动力学课程节选

Some things are going to slide through, and that's actually a bother. It's a problem.

有些问题会躲过检查，这确实很烦，这是个问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, I have to check for that, but nine times out of ten there's not going to be a problem so now let's do this.

所以，我需要做一个检查,但是通过十有八九,这不会出现问题，现在我这样处理。

哈佛公开课 - 计算机科学课程节选

Question: Doctor, before you perform autopsy ? did you check for a pulse?

问题，医生，在你开始解剖前,你检查了脉搏吗？

耶鲁公开课 - 死亡课程节选

Question: Did you check for blood pressure?

问题，你检查了血压吗？

耶鲁公开课 - 死亡课程节选

Question: Did you check for breathing?

问题，你检查了呼吸吗？

耶鲁公开课 - 死亡课程节选