Sometimes we can't help but slow down because everybody is slowed down in front of us, we have no choice.

有时我们不得不慢下来因为前方,每个人都已减速，我们别无选择。

耶鲁公开课 - 政治哲学导论课程节选

As you come to the top of the building, the elevator has to decelerate, so that it loses its positive velocity and comes to rest.

当你要到顶时,电梯需要减速,此时电梯速度减小最后静止

耶鲁公开课 - 基础物理课程节选