这节课主要讨论速度和加速度。

We will discuss velocities and acceleration.

youdao

你强调的是速度和加速性能吗？

Do you want to emphasize speed and acceleration?

youdao

目前为止，是关于速率，平均速度和加速度。

All right, so far, about speeds and average velocities and accelerations.

youdao

It says that, "If a body has an acceleration, then you need a force and the relation of the force to acceleration is this thing."

它是这么说的,"如果一个物体有加速度,那么你需要有一个力,力和加速度的关系是这样的"

耶鲁公开课 - 基础物理课程节选