It was a great round shield about three feet across and it had--let me step out here so that I can show you. Can you hear me back there?

它是一块直径大概有三英尺的巨大圆盾,恩,它还有...我出来演示吧,这样你们就能看清楚,能听到我说话吗

耶鲁公开课 - 古希腊历史简介课程节选

So I think a lot of people if you go back today and you look at tapes of the Kennedy Nixon Election in 1960 some American help me out here, '60 right?

我想如果你们今天回家去看,肯尼迪和尼克松1960年竞选的录像,美国学生帮我确认一下,是60年吧

耶鲁公开课 - 博弈论课程节选

But notice what this does. The first thing it does is, it says, let's check and make sure x is greater than or equal to 0. If it isn't, notice what's going to happen. None of that block is going to get executed, and it's going to come down here and print out a useful piece of information, which says, hey, you gave me a negative number. I don't know how to do this.

做的是和以前一样的事情,但是注释它做了什么，第一件做的事情就是,程序说，要去检查并且确信x是大于等于0的，如果不是的话，请注意会发生什么,下面的代码都不会被执行,程序会到这里来然后显示一些有用的信息,信息会说，嘿，你给了我一个负数,我不知道该怎么弄这个了。

麻省理工公开课 - 计算机科学及编程导论课程节选