"I can do things that are good for me,you know, not just try to exist hand-to-mouth or in survival mode,you know?

VOA: standard.2010.02.23

I hope you enjoy using Star Festival and do let me know the questions that you are trying to answer.

事情，我希望你使用“七夕“愉快并让我了解,你想找出答案的那些问题。

麻省理工公开课 - 媒体、教育、市场课程节选

If you don't give me seven hours a week, I don't know what I can do for you.

如果你们一周不学习7个小时，我不知道我能为你们做什么了。

麻省理工公开课 - 固态化学导论课程节选

"I would say that it is my crisis training in the airline industry that helped me know at that moment when you feel emotionally paralyzed what to do and how to start communicating that sad news."

VOA: standard.2010.02.25

Can you tell me, how do you know how long a meter is?

你能告诉我,你怎么知道一米有多长吗

耶鲁公开课 - 基础物理课程节选

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