All right. The other thing I have to teach you is matter-energy interaction so that we can see how the Balmer series validates the Bohr model.

好的，我要教你们的里一个知识点是,物质能量的相互作用，我们可以见证,巴尔末线系是怎样证实波尔模型的。

麻省理工公开课 - 固态化学导论课程节选

Let's review another point and I'll get to a second question that was asked.

现在让我们复习另一个知识点，我将给出第二个问题。

耶鲁公开课 - 聆听音乐课程节选

So there is one more thing you need to know.

所以这还有一个你们需要知道的知识点。

麻省理工公开课 - 固态化学导论课程节选

I mentioned something of increasing importance only later, which is that you are free to pick another set of axes, not in the traditional x and y direction, but as an oblique direction.

后来我又讲了更重要的知识点,你可以随意选取另外一个坐标系,不再是传统的 x 和 y 方向,而是倾斜过的方向

耶鲁公开课 - 基础物理课程节选