Somehow, if you could manufacture a really smooth frictionless surface, that if you took a hockey puck or something and an air cushion and you give it a push, in some idealized world, it'll travel forever.

如果你制造一个绝对光滑无摩擦的表面,然后在上面放个冰球或者别的什么,或者气垫,然后推它一下,在理想条件下,它会永远运动下去

耶鲁公开课 - 基础物理课程节选

if you want to see some more, if you want to travel, so you need it absolutely.

如果你想见识更多，如果你想旅行的话，你绝对需要英语。

学习英语的理由 - SpeakingMax英语口语达人

maybe buy some horses. And travel. Travel a lot, I want, you know,

还可能会买一些马。我还想去旅行，去很多地方旅行，

事业和人生都重要 - SpeakingMax英语口语达人