我们能从第一题里面，能得到这里所有需要的信息。

Because we have all the information we need there.

youdao

为了使对方得到答案，他们竟发明了一套完整的密码系统：坐在右边的一位，需要知道第五题的答案时，他就用铅笔在桌子上轻轻敲五下，坐在左边的一位回敲两次——表示答案是B。

One kid would tap his pencil lightly five times indicating he needed the answer to number 5.

youdao

接线员：你需要人帮忙的是什么样的数学题？

Operator: What kind of math do you have that you need help with?

youdao

We didn't just need that n, not just the principle quantum number that we needed to discuss the energy, but we also need to talk about l and m, as we did in our clicker question up here.

我们不仅需要ｎ,不仅要这个可以,决定能量的主量子数，还需要ｍ和ｌ,就像我们做这道题这样。

麻省理工公开课 - 化学原理课程节选

And, that's a good thing to know because if you come out with an answer that's somewhere near the diameter of the universe and it's supposed to be the diameter of an atom, then you will know that you probably made a mistake.

这是我们需要知道的,因为当你做一道题得到的答案,是宇宙的直径,而正确答案是原子直径时，你能很快发现你的错误。

麻省理工公开课 - 固态化学导论课程节选

Why doesn't everyone go ahead and take ten more seconds on the clicker question.

每个人为什么不开始做课堂表决题呢,只需要10多秒的时间。

麻省理工公开课 - 化学原理课程节选