And, even Cavendish, one of the things that he observed was that hydrogen could be combusted to produce water vapor.

甚至卡文迪许都观察到了,氢气燃烧,会产生水蒸气。

麻省理工公开课 - 固态化学导论课程节选

Why do I believe in certain planets too far away to be observed directly through a telescope?

我为什么会相信在望远镜正常观测范围外的,遥远之处存在行星

耶鲁公开课 - 死亡课程节选

Then he observed, through time, after subjecting pigeons to this torture for some time -it might be not approved by--it's not really torture, it's like dieting or something, you've all lived through that, right?

随着时间流逝,他还观察,在这酷刑实施了一段时间后,也不能真的说是酷刑,其实有点像节食之类的,你们很多人也节食过,对吧

耶鲁公开课 - 金融市场课程节选

It's one of the interesting and curious features of the Protestant mask, Comus,that this is a distinction that's never really observed or acknowledged. Virginity and chastity seem to be used often and kind of awkwardly, I think, interchangeably.

这是新教徒面具里一种有趣而不寻常的特征，《科玛斯》，这是一种永远,不会被发现或是承认的区别，我觉得童贞和贞节,似乎经常被笨拙的互换使用。

耶鲁公开课 - 弥尔顿课程节选

So even if we grant that what Socrates meant by invisible was can not be observed, we still have to say with Simmias , you know, fourth is just not true.

所以即使我们认同苏格拉底,指的无形是不能被感知，我们仍旧站在西米亚斯这边，第四点是不正确的。

耶鲁公开课 - 死亡课程节选