"Colin," she began mysteriously, "do you know how many rooms there are in this house?"

“科林，”她神秘地说，“你知道这所房子有多少个房间吗？”

youdao

But how do you know how many you need?

但是你怎么知道需要多少名呢？

youdao

You know how many committees we have at Apple?

知道在苹果我们有几个委员会吗？

youdao

You can go ahead and use that equation, or you could figure it out every time, because if you know the total number of nodes, and you know the angular node number, then you know how many nodes you're going to have left.

你们可以直接用这个方程，或者每次都自己算出来，因为如果你们知道了总的节点数，又知道角向节点数，就知道剩下的节点数是多少。

麻省理工公开课 - 化学原理课程节选

It doesn't mean anything until you know how many shares are outstanding because if I own one thousand shares and then you look it up and find out how many shares are outstanding-- there are one thousand-- you say, hey I own the whole company.

这毫无意义,除非你知道总共发行的股票数量,如果你有十手股票,但后来发现,总共发行的股票数量,就是一千股,你就可以说,整个公司都是我的

耶鲁公开课 - 金融市场课程节选

I think you should take the lab sometime, but I don't know how many semesters that you have to take.

我觉得你们应该是不是地去做几次实验,我不太清楚你们要上多少个学期的课

耶鲁公开课 - 基础物理课程节选

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