And so, if you rewind the tape and play it again over and over and over again, each time you set things up the very same way they must move or transform or change or end up in the very same state.
所以,如果你将一盘磁带,反反复复地播放,每次你播放的内容,从头到尾的起承转合一定是,绝对一致的
So we left off last time with looking at a bit of coding and teasing you with the upcoming problem set.
我们上次讲到了查看一些代码,并且给你们带来这下面的习题。
It's exercising a set of muscles that a lot of you have not spent a lot of time exercising.
它用到的一些肌肉,是你们中大部分人平时没怎么用到的。
If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.
如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上
To help you know sort of ahead of time quickly what those views are, I want to start by describing a set of views that many of you probably believe.
让你们稍微提早点儿知道,那些观点是什么,我想要从描述它开始,可能你们有些人会相信。
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