You start here and you fire a projectile It's going to go up and it's going to come down.

从这开始,你抛出一个物体,它将上升至一定高度然后落下

耶鲁公开课 - 基础物理课程节选

Being and void, being and void, so now I've got my plus two little projectile coming in, and plus two zooms right through.

有和无，有和无，现在带两个正电荷的发射体进来了，两个正电荷正好穿过。

麻省理工公开课 - 固态化学导论课程节选

Another question is: at what angle should you fire your projectile so it will go the furthest?

另一个问题是以多大角度抛出,物体能飞得最远

耶鲁公开课 - 基础物理课程节选

Then we did some projectile problems.

我们还研究了一些抛体运动

耶鲁公开课 - 基础物理课程节选

That's a problem of projectile motion.

这是抛体运动的问题

耶鲁公开课 - 基础物理课程节选

Projectile motion.

抛体运动

耶鲁公开课 - 基础物理课程节选

Quite often, it's natural to pick x and y in a certain way, because starting a projectile near the Earth, it makes sense to pick the horizontal as x and vertical as y.

我们经常会很自然地选取 x 轴和 y 轴,因为如果在地表附近做抛物运动,我们通常以水平方向为 x 轴,竖直方向为 y 轴

耶鲁公开课 - 基础物理课程节选