So fruitful is their land that they are spared the evil necessity of traveling on ships and there you have an interesting point about the Greeks.

他们的土地丰饶,这一切让他们远离了航行的厄运,这时你会发现关于希腊很有趣的一点

耶鲁公开课 - 古希腊历史简介课程节选

But it's not a big con, because you can set up experiments in free space far from everything, where objects will, in fact, maintain their velocity forever.

但这并不是个反例,因为你可以在一个远离一切的空间里做实验,在那里,物体可以永远保持现有速度

耶鲁公开课 - 基础物理课程节选