剥开包装纸，就像剥开糖纸，每个颜色都有一个塑料格子，都只有拇指盖大小。

Each of the color is packed with a little plastic pan at the size of the nail of my thumb.

youdao

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