It says, take this thing on the left and use it as a name to bind to the value on the right.

它意味着，把左边的对象,当做名字绑定到,右边的值上去。

麻省理工公开课 - 计算机科学及编程导论课程节选

So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.

把2代入到这里，所以得到1除以,这就是我们最终的方程，这叫做Balmer系，以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。

麻省理工公开课 - 化学原理课程节选