So if you wanna do something conditionally, you generally needs to ask the question, is the following true or false.

假如想在一定条件下做一件事情，你需要判断下这个条件，来看看条件是真还是假。

哈佛公开课 - 计算机科学课程节选

Do I have two yes answers if you wanna check two conditions at once? You know, this might seem to be a bit of a new context for some of you but consider a typical website.

我能不能对两个条件同时判断,来看看它们是不是都为真？,这些概念可能对你们中一些人有点新颖,那么就考虑一个典型网站。

哈佛公开课 - 计算机科学课程节选

I wanted to go back and leer at my strange Dickensian mother in the hash joint. I tingled all over from head to foot.

这时的我已经有些神志不清，真想回去看看,小饭馆里奇怪的幽灵一般的母亲。

耶鲁公开课 - 1945年后的美国小说课程节选

And we have to start to look at other experiments to try to get at what is it about physical attractiveness ? that makes people want to pursue the relationship?

我们必须看看其他的实验,来揭开外表吸引力的真面纱,了解为什么它能促使男女双方继续交往？

耶鲁公开课 - 心理学导论课程节选

All right, it's so if I looked at it, sorry, IF x is less than y, THEN check to see IF x is less than z, and if that's true, print out x is the smallest.

好，代码是这样的，对不起，是不是x比y小，然后去看看是不是x比z小，如果都为真的话，显示x为最小值。

麻省理工公开课 - 计算机科学及编程导论课程节选