Two, so now let me drop down 2.

，把2写下来。

哈佛公开课 - 计算机科学课程节选

So, we paid one dividend and I don't know how much excitement it generated, but that's the Does this mean that share price will drop by $2 after a $2 dividend?

所以我们分了一次红,我不知道这引起了多大的兴奋,但这是,分了两美元股利后,是不是每股价格就会下降两美元

耶鲁公开课 - 金融市场课程节选

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