That economy and that society go forward and flourish for, as I say, about 400 years maybe--perhaps about 400 years.

这种经济和社会,发展繁荣了,大概四百年,也许四百年

耶鲁公开课 - 古希腊历史简介课程节选

Classical, maybe a little more than that, but not all that many. Here's-- I don't know, we should do a survey sometime.

古典音乐,也许稍多一点,但没有多少,大概,我不清楚,也许应该找时间做个调查

耶鲁公开课 - 聆听音乐课程节选

Now, Ludwig van Beethoven was in his fifties when he was working on his last symphony-- what would prove to be his last symphony-- his Ninth Symphony, and he'd been tinkering with this particular melody all the way back to probably 1803, so it's about twenty years or so.

路德维希·凡·贝多芬在五十多岁时,创作了他最后一首交响乐,后来成为他最后的交响曲,就是他的第九交响曲,他一直在锤炼这段旋律,也许要追溯到一八零三年,所以大概经历了二十个年头

耶鲁公开课 - 聆听音乐课程节选