But as you get older and you have a lot of spare time, you think about what you are doing, which is something I have the luxury of doing right now, and I realized this is more tricky.

但随着你们年龄的增长,有更多空闲时间之后,你就会思考你做的事情,我现在就有很多闲暇思考这些问题,我意识到这东西其实很精妙

耶鲁公开课 - 基础物理课程节选

We tend to stay on campus. But... I have, I do have some friends who like go to New York or Boston,

所以我们基本上都待在校园内。不过……我有一些喜欢在空闲时间去纽约或者波士顿的朋友。

耶鲁奖学金获得者 - SpeakingMax英语口语达人

that's still something really neat that I can do in my free time.

我在空闲的时间还可以做一些很有意义的事情。

成功的医学研究 - SpeakingMax英语口语达人