Japan,Germany and China are key producers of the photovoltaic panels used to capture sunlight and pass it onto the electrical grid.

VOA: standard.2009.10.27

Right now it's got that second key word there called pass, which is just Python's way of saying there's an empty body in here.

现在我在完善它的一个简单部分,但是首先，类是用来干什么的呢？,把类认为是可以创建一个。

麻省理工公开课 - 计算机科学及编程导论课程节选

But again, the key takeaway there was how many numbers did I touch on that pass?

同样，在这个过程中,我一共移动了几个数字？

哈佛公开课 - 计算机科学课程节选