You had a semiotic system, whereas before, yesterday, or a minute ago you had no language at all.

一个符号系统诞生了，然而之前，昨天，或者就是一分钟前，根本就没有语言。

耶鲁公开课 - 文学理论导论课程节选

A couple of announcements before we get started: tomorrow there will be a 10 minute quiz in recitation based upon the content of homework one.

在我们开始之前有几点声明：,明天会有一个10分钟的小测验,详细叙述课后作业内容。

麻省理工公开课 - 固态化学导论课程节选

This is actually very representative of when you do research in the laboratory, you will find often things do not work quite exactly as they worked 20 minutes ago when you just checked it in your office, for example.

在实验室做研究时,这个实际上是非常具有代表性的，举个例子,当时只是在办公室核查它时,你经常会发现事物无法,像它们20分钟之前那样精确的工作。

麻省理工公开课 - 化学原理课程节选

But as I'll mention in a few minutes, there are possible schemes that one can follow to get you to the goal line as well.

但正如我几分钟之前所提到的,还有很多可行性方案可以遵循,同样会让你很健康

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But before doing so, I'll take questions for a few minutes.

但在开始之前，先给大家几分钟的提问时间。

耶鲁公开课 - 心理学导论课程节选

So how many before five minutes ago had heard the name Goudsmit?

有多少人在五分钟之前听说过Goudsmit？

麻省理工公开课 - 化学原理课程节选