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

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

But what I needed to do this problem was to find these two unknowns.

但我解决这道题需要找到这两个未知量

耶鲁公开课 - 基础物理课程节选