But notice how long it took us to get there, how many centuries it took.

但是要注意到这要多长时间，它花了多少个世纪。

耶鲁公开课 - 新约课程节选

How long did it take old Chopin to think that up do you suppose? Two seconds?

老肖邦花了多长时间去构思这段曲子,你觉得呢,两秒钟吗

耶鲁公开课 - 聆听音乐课程节选