If you put your fingers between the plastic opening at the bottom, and here's where you gotta watch out for the spring, pull the thing apart and that's it.

如果你把手指放到,底部的缝隙中间，这里你需要小心，你剥开就会发现这个了。

哈佛公开课 - 计算机科学课程节选

Sometimes it's a lot easier to reach into your wallet, pull out a piece of plastic and voila, there are the next several shuttle times.

都是不太方便的,也许伸进口袋，拔出一块塑料来看看，还有其他的班车时间呢。

哈佛公开课 - 计算机科学课程节选