So that is an aspect of our sequence of lectures, beginning with the last one, that will be postponed until next week.
以上是我们讲座的顺序,上面提到的这种关系我们下周会讲到。
I think our add date this semester was beginning of October,
我想我们这个学期的加课日期是十月初,
Let's just, by way of refreshing our memory, the beginning of Beethoven's Fifth Symphony.
让我们唤醒自己的记忆,温习贝多芬第五交响曲的开始乐段
The extended-through-space train I pick out at the end of our walk is the same as the extended-through-space train that I picked out at the beginning of our walk.
走到末尾的时候,我谈到的贯穿空间的火车,和一开始我谈到的,是同一辆。
What it means is if you'd release a rock at that location one second before with a certain speed that we can calculate, it would've ended up here with precisely the position and velocity it had at the beginning of our experiment.
它的意义在于,若在该处以特定速度抛出一个物体,这个速度可通过计算得到,一秒之后,物体会运动至我们设定的起点,并且速度为我们设定的初速度
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