It's related to the frequency with which you go around the circle Why is that?

它也跟圆周运动的频率有关,为什么呢

耶鲁公开课 - 基础物理课程节选

Well, right now, what we do out here is we do a little bit of stretch and handstands.

嗯，现在呢，我们在这儿做点儿伸展运动和倒立。

圣莫妮卡的 DJ - SpeakingMax英语口语达人

Or a football player--when you're running down the field, why did you go to this way instead of that way ? when you're running down the field?

或者是问一个橄榄球运动员--当你在操场上奔跑时，你为什么要往这边跑而不是那边呢,当你在操场上跑的时候？

耶鲁公开课 - 金融市场课程节选

Do you like the playgrounds? And Golden Gate Park?

你喜欢去运动场吗？金门公园呢？

溺爱女儿的父亲 - SpeakingMax英语口语达人

If you want to describe this particle, what's the kinematics?

如果你想描述这个质点,如何从运动学角度来描述呢

耶鲁公开课 - 基础物理课程节选

What is the fate of this particle?"

质点会怎样运动呢"

耶鲁公开课 - 基础物理课程节选

For example, if you started here and you did all this and you came back here, the average velocity would be zero, because you start and end at the same value of x, you get something; 0 divided by time will still be 0.

例如,如果你从这里开始运动,经过这个过程又回到这里,平均速度就是0,因为初态和末态的位移相同,你得到了什么呢,0除以时间还是0

耶鲁公开课 - 基础物理课程节选

Now, what happens if the elevator is accelerating upwards with an acceleration a?

现在如果电梯向上以加速度 a 运动,会发生什么呢

耶鲁公开课 - 基础物理课程节选