So in a moment you're going to go ahead and hit the spacebar and then as things fall from the screen when they line up with the left arrow, hit the left arrow with a different arrow, hit that arrow and see how good a score you can get.

一会儿你走到前面，敲一下空格键,当屏幕上面的东西从左边往下掉的时候,你就敲一下键盘上的左键,是哪个方向，敲对应的方向键就可以了,我们来看看你能得多少分。

哈佛公开课 - 计算机科学课程节选

They count where these particles hit the screen.

当粒子撞击到屏幕的时候就记录一次。

麻省理工公开课 - 固态化学导论课程节选

So, I did some reading quickly and she looked at the screen for a moment and then I suggested we hit the top right button to purchase new Charlie Ticket, whatever that is, value tickets and passes.

所以，我快速阅读了一下，她看着屏幕一段时间,然后我建议点击右上边的按钮,来买一张新的Charlie票，不管怎样，那是一张有值票，可以通过。

哈佛公开课 - 计算机科学课程节选