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

But at the end of the day, if you move this metal thing aside with your fingers, don't squeeze it too hard.

但是在下课后，如果你用手指触碰这个金属块，不要用力过猛。

哈佛公开课 - 计算机科学课程节选