为了让你的父母知道你在做什么和你想做什么，你可以谈谈你现在的学校生活和你未来的梦想。

To get your parents to know what you're doing and what you want to do, you could talk about your school life now and your dreams for the future.

youdao

但愿你知道你在做什么。

I hope you know what you are doing.

youdao

但是你，在拒绝承认这层关系，你便知道你在做什么。

But you, who are doing the disowning, you know what you're doing.

youdao

I don't know what the dates say, 1916, excuse me, and you can see what he's done.

我不知道具体时间了，1916年，不好意思，你能看到他在做什么了。

麻省理工公开课 - 固态化学导论课程节选

OK? Because what am I doing? It's called bubble sort because it's literally bubbling along, right?

明白了么？你要知道我在做什么,冒泡排序真的就像冒泡，对么？

麻省理工公开课 - 计算机科学及编程导论课程节选

Computing square root. I'm going to capture it in a piece of code, I'm going to be able to refer to it by a name, and I'm going to suppress the details, meaning inside of that computation, you don't need to know what it does. You just need to know, if I give it the right kind of input, it'll give me back an input that satisfies the contract that I set up.

比如计算平方根,我会用一段代码来说明,我将给它命名,并且忽略细节,意思就是在这一段计算过程中,你不用知道它做了什么，你只需知道，如果我进行了正确的输入,它将会给我符合条件的输出。

麻省理工公开课 - 计算机科学及编程导论课程节选