You take a potato, you turn it around, it looks different.

你拿一个土豆,把它转过来,看起来就不一样了

耶鲁公开课 - 基础物理课程节选

And what can be done to turn it around?

那我们可以做些什么来扭转这个局面呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So we know that it'll go up for one second then it will turn around and come back.

我们知道了,物体在上升一秒后开始下降

耶鲁公开课 - 基础物理课程节选

So, we know it's going to go up and turn around and come down.

我们知道物体会先上升然后调转方向下落

耶鲁公开课 - 基础物理课程节选