This is a key moment in the evolution of revolutionary politics in Russia as we shall see a little later on.

这是俄国革命变革的关键时刻,我们之后会谈到这些

耶鲁公开课 - 欧洲文明课程节选

and calling on key customers here in the United States,

拜访美国的关键客户，

我的职业是 - SpeakingMax英语口语达人

It's deliberate that a lot of the examples in lecture are fairly short and bite-size so that you can actually focus on pulling out the key ideas without getting distracted by line and lines of code.

很多的演讲中的例子,是短小的,因此你们可以集中于提取其中的主要思想,而不是被一行行的代码给分心。

哈佛公开课 - 计算机科学课程节选

In particular functions that operate on the data, perhaps on other data as well. The key idea here is to bind together the data and the functions that operate on that data as a single thing.

特别是处理数据的函数，也可能处理其他数据,这里的关键思想就是,将函数和操作数据的函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.

想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

And in Scratch did you probably see the key word "and" on one of the blocks.

在Scratch中，你们大概看到那个关键字,“and“在其中一个程序块中。

哈佛公开课 - 计算机科学课程节选