下一个圣诞节只需用喷雪碰撞它便成了。

Next Christmas just hit it with the spray snow.

youdao

我常叫它完全弹性碰撞，但其实并不需要这样叫。

I will often call it a completely elastic collision, which is really not necessary.

youdao

其次，它需要能够避免碰撞。

Second, it needs to be able to avoid collisions.

youdao

They take an atom of lead, accelerate it and have it collide with an atom of nickel.

他们选取一个铅原子，将其加速,让它与镍的原子碰撞。

麻省理工公开课 - 固态化学导论课程节选

Pressure is when you have one of these hard spheres colliding against the wall.

这是一个小球,它与墙发生碰撞。

麻省理工公开课 - 热力学与动力学课程节选

For instance, if I have, what is pressure?

它源于小球与容器壁的碰撞？

麻省理工公开课 - 热力学与动力学课程节选