What does it mean to him? "Nothing,and I'm not even sure when it is.

VOA: special.2010.02.08

If you're wondering what's OK or what's not OK, it's very clearly written out in this handout, so make sure you read through it, because it is your responsibility to make sure that your calculator does not have anything extra programmed in it.

如果你不清楚什么可以什么不可以，讲义上写得很清楚，所以请大家务必看完它，因为你有义务保证,在自己的计算器里,没有编上额外的程序。

麻省理工公开课 - 化学原理课程节选

Again it's like anyone who does important things it's hard to judge the whole picture and on that I am sure he has created value for the economy.

同理，对于那些做着重要事情的人们,很难估测大局,不过我很肯定的是,他已经为经济创造了价值。

耶鲁公开课 - 金融市场课程节选

I'm not sure it does compress the range.

但是我不太确定这是否压缩了范围

耶鲁公开课 - 博弈论课程节选

Well, break it down into pieces. Suppose x is positive. Does it terminate? Sure. All right?

好，分开来讨论，假设x是整数,程序会终结么？肯定会的对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

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