So if you've ever done something bad like drop your laptop or smack your computer and you've never been told not to do this.

如果你以前做过类似的摔或拍打电脑,并且没有人告诉你不可以这样做。

哈佛公开课 - 计算机科学课程节选

You can use this to express possession or a lack of possession of anything. Tangible or intangible.

你可以用它来表示你有或没有什么东西。有形与无形的事物都可以通用。

I have 课堂 - SpeakingMax英语口语达人

Short answer: no, at least not in C. You can construct such constructs in other languages and in theory even C.

简单回答：没有，至少在C语言里是没有的，你可以,在C语言或其他语言中创建这样一个结构体。

哈佛公开课 - 计算机科学课程节选

If you,or a friend of yours,wants to see this syllabus after the class,and you don't have one, it's on the Classes v2 server.

如果你或你朋友想在课后看看,但你没有多余的，可以在Classes，v2服务器上找到。

耶鲁公开课 - 新约课程节选

px And I arbitrarily chose to put it in the 2 p x, 2pz we also could have put it in the 2 p y or the 2 p z, it doesn't matter where you double up, they're all the same energy.

我任意地选择放入至，我们也可以把它放入2py或，它与你在哪双倍填充没有关系，它们都在相同的能级。

麻省理工公开课 - 化学原理课程节选