The chart begins to stir from its post-holiday slumber this week, as two positions change hands. Hey, it's a start!

榜单随着本周假期后恢复的两个位置易手而发生了改变。嘿，现在我们开始!

When something is in motion, its position changes.

当物体运动时，它的位置会发生变化。

Plus, its position changes with time.

此外，它的位置随时间而变化。

Velocity is the way your position changes over time, and it’s also a pretty big deal.

速度是你的位置随时间变化的方式， 它也是一个相当大的问题。

But there’s one more question: How does the ball’s position change over time?

但还有一个问题：球的位置如何随时间变化？

Velocity is the way your position changes over time, and it's also a pretty big deal.

速度是你位置变化的方式 期间，也很重要。

But there's one more question: How does the ball's position change over time?

如何？ 球的位置会随着时间而改变吗？

In other words, the experts believe that a politician's positions change depending on whether they believe it is good for their political party.

换句话说，专家认为，政治家的立场变化是立足于是否对其政党有利的基础上的。

That is my intent, and the greatest thing about what I do, for me, is that I'm in a position to change people's lives.

这就是我的初衷，对我来说，我所做的事情，最大的意义在于，我所处的位置能够改变人们的生活。