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

It's going to be a I chord, then a IV chord,and we'll drop down to the IV chord.

它现有一个I级和弦，然后是IV级和弦，接着我们往下降到IV级和弦。

耶鲁公开课 - 聆听音乐课程节选

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

The way we read this graph, is you give me an S2, I read across to the pink line and drop down, and that tells me the best response for Player I.

这个图的作用是,给定一个S2,找到粉线对应的坐标,然后就能找出参与人I的最佳对策

耶鲁公开课 - 博弈论课程节选