And the reason for this, and this is a very important point about the photoelectric effect, and the point here is that the electrons here are acting as particles, you can't just add those energies together.

这个现象的原因是，这是光电效应非常重要的一个论点,这个论点就是电子,在这里是粒子行为，你不能仅仅把这些能量加在一起。

麻省理工公开课 - 化学原理课程节选

And there is a reason, perhaps a reason for this, too.

关于这一点有一个理由。

耶鲁公开课 - 政治哲学导论课程节选

All right, so this gentleman is saying... There's no dominant strategy so - Right, so this gentleman's saying, a good reason for choosing Alpha in this game is it's less risky.

很好,他说,这里没有优势策略 所以,没错,他说,选α是因为这样做风险更小

耶鲁公开课 - 博弈论课程节选

Because as you'll soon find, when you're writing programs 0 that aren't just four lines long but are 40 or 400 which very quickly becomes easy, you'll find that even you the next morning have no idea what this code does for whatever reason, and just having some English comments is a huge boon to comprehension for yourself and others.

你们自己写程序时就会发现,用40行甚至400行代码来代替繁杂拥挤的4行代码0,将会让事情简化许多，你会发现，即使由于某些原因,你不知道如何写代码，先写些注释，于人于己，都是好事,易于理解嘛。

哈佛公开课 - 计算机科学课程节选

Specifically, it's always the z that forms the sigma orbital, and the reason is at least at a minimum for this class we always define the internuclear axis as the z axis, so this is always the z axis, so it's always going to be the 2 p z's that are coming together head-on.

特别的，z总是形成sigma轨道，这是因为至少在这个课里面,我们总是定义核间轴为z轴，所以这总是z轴，所以2pz轨道总是,朝一个方向出现。

麻省理工公开课 - 化学原理课程节选