He tested the free-diving self-propelled submersible - one of only two in existence at the time - on increasingly deep dives off the California coast.

VOA: standard.2010.06.21

Now, as I said last time, the subject of free will--or free will, determinism, causation and responsibility, this cluster of problems-- is an extremely difficult and complicated physical problem.

正如我上次所说的,自由意志这个主题 或者说自由意志,决定论,因果论,责任,这一堆问题,是极端困难和复杂的物理问题

耶鲁公开课 - 死亡课程节选

So that you get a good idea of what people do in their free time and what the dorms are like.

所以你可以了解人们闲暇时间做什么，宿舍什么样。

沟通很重要 - SpeakingMax英语口语达人

"Everyone is entitled to free health care at the time of need, both in relation to consulting their general practitioner, and to hospital treatment and operations.

VOA: standard.2009.09.24

I mean a blanket term, a guiding concept, a transcendental signified, something that explains the nature of the structure and something also, as Derrida says, which allows for limited free play within the structure; but at the same time the structure has this kind of boundary nature.

是一个概括性称呼，一个引领概念，一个超验所指，它解释了这个结构的内涵，正如德里达所说，它允许在结构内有限的自由游戏;,但同时这个结构也有限性。

耶鲁公开课 - 文学理论导论课程节选

I could just have a good time playing a whole bunch of day parties, play some stuff at night that was free,see my friends, and not feel like I was missing something, or that I had to do anything.

VOA: standard.2010.04.07

I have a lot of free time. I do freelance work actually

我的闲暇时间很多。其实我是自由设计师，

自由职业者的生活 - SpeakingMax英语口语达人