And as I followed many of the students after they graduate, whether the students who work with me here as undergrads or students who I tutored, when I followed the path,it wasn't just empty words.

据我了解，很多学生毕业后，无论是与我一起工作,还是我辅导的学生，当我了解他们的前路，并不是些空话。

哈佛公开课 - 幸福课课程节选

It wasn't just California, because California was a huge state, with all kinds of--but mostly empty--land.

不是整个加利福尼亚,因为加利福尼亚是个很大的州,有着各种各样的土地,但多为空地

耶鲁公开课 - 金融市场课程节选

So they weren't hitting anything, we're dealing with mostly empty space.

但他还意识到，当它们碰到东西的时候。

麻省理工公开课 - 化学原理课程节选

Keep in mind we do have this p orbital here and it's coming right out at us. And this p orbital is here, but it's empty, it doesn't have any electrons in it, that's why we don't have to worry about it in terms of getting our electrons as far away from each other as possible.

他们程120度角互相远离,这样它们离得最远，记住我们这里确实有个p轨道，它朝向我们，这里有个p轨道，但它是空的,里面没有电子,这就是为什么我们在考虑。

麻省理工公开课 - 化学原理课程节选