我有两本字典。

I have two dictionaries.

youdao

我有两条胳膊。

I have two arms.

youdao

我有两个膝盖。

I have two knees.

youdao

Now, when we talked about optimization problems in dynamic programming, I said there were two things to look for.

现在，当我们讨论,动态编程中的最优化问题时，我想说有两件事需要注意。

麻省理工公开课 - 计算机科学及编程导论课程节选

If I were to hold up two pieces of paper, there's a sense in which they are participating in "Twohood."

如果我拿起两张纸,便有这样一层含义,即,这两张纸分有了 二性

耶鲁公开课 - 死亡课程节选

And so in theory after just 2 or 3 steps you were in order of magnitude farther along in this counting process than I would be because I'd still be on person literally 3 or 4.

因此从理论上说,经过这样短短的两三个步骤,你们就有了分级次序，比我数数快多了,因为我才数到第三四个人。

哈佛公开课 - 计算机科学课程节选