One way to mark time is to imagine it carries a clock as it moves, and put markers every second.

标记时间的一种方法是,想像它带着时钟运动,并且每秒做一次标记

耶鲁公开课 - 基础物理课程节选

What am I doing? I'm creating a list with just that special symbol none in it.

我在做什么？，我只是在创建一个,有着特殊标记。

麻省理工公开课 - 计算机科学及编程导论课程节选

So what we do is we pick an origin, call it zero, we put some markers there to measure distance, and we say this guy is sitting at 1,2,3,4,5.

我们现在选择一个原点,称其为零点,我们做一些标记来测量距离,这个点在五个单位长度的地方

耶鲁公开课 - 基础物理课程节选

Now, in that Northern society and here we're using labels pretty loosely, but so be it the northern states; and well I'll leave the outline up for the moment. No I won't.

现在,在北方社会,现在我们标记做得很散,但必须这样,北方的州,我呆会会给你们一个大纲,但不是现在

耶鲁公开课 - 美国内战与重建课程节选

So, what happens here is this opening phrase, that we'll call A-- musicians like to label stuff just with alphabetical labels to keep it simple.

那么,首句这里,我们称作A,音乐家喜欢用字母,来做标记,这样比较简单

耶鲁公开课 - 聆听音乐课程节选

Suppose that there were some sort of genetic marker and, although we didn't have a tattoo that you would just have to look at, -- but you could have genetic counseling-- have your DNA examined and you could tell, if you had the DNA testing, how much time you had left.

假设有某种基因标记，虽然我们没有,让你不得不去看的在身上的标记了，但你可能会去做基因咨询-,检查你的DNA，如果你做了DNA化验的话，你就能知道自己还剩多少时间。

耶鲁公开课 - 死亡课程节选