It is generally believed that in order for that to work you need the round ship delays in milliseconds, in 100 milliseconds, in 200 milliseconds, not 8s.

人们一般相信，为了运行正常,总延迟需要控制在毫秒的单位，在100毫秒，200毫秒以内，而不是8秒。

麻省理工公开课 - 媒体、教育、市场课程节选

So within a couple of generations people could move up from being the lowest slaves to two generations of being free Roman citizens.

所以几代以内,奴隶能从最低社会等级,上升两位，成为自由的罗马公民。

耶鲁公开课 - 新约课程节选

And until 1954, running the mile in under 4 minutes was considered impossible.

直到1954年，在四分钟以内跑完一英里,被认为是不可能的。

哈佛公开课 - 幸福课课程节选

I started by saying, "Could you come up with any kind of-- well,you tell me in fifty words or less what I said in lecture yesterday about harmony.

我是这样开头的，你们能够想起任何-,好吧，你们用五十个以内单词告诉我在昨天的课上我就和声问题说了些什么。

耶鲁公开课 - 聆听音乐课程节选