And in particular, there are some key words that Python is going to use that have to be excluded.

尤其是，Python需要用的一些关键词,就被排除在外面了。

麻省理工公开课 - 计算机科学及编程导论课程节选

And it also allows us to look for certain key words and themes.

它也允许我们查找,特定的关键字和主题。

哈佛公开课 - 计算机科学课程节选

We hear about key individuals, and the last time I mentioned to you two words, I think I did, but I'll mention them again this time.

我们了解了关键人物,上一节课我提到了两个词,我想我提到了,这次我会再提到的

耶鲁公开课 - 古希腊历史简介课程节选