You could think, you have to think earnings are going to go up twelve-fold to get it down to four times earnings, which will take a long, long time.

你可能会想，你必然认为收益会上涨12倍,让它回落到四倍于原来收益的地方，会花费很长一段时间。

耶鲁公开课 - 金融市场课程节选

Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.

这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下

耶鲁公开课 - 聆听音乐课程节选