“α质点”造句

P点和Q点分别表示该质点的两个位置.
Points P and Q represent two positions of the particle.

碰撞并不往往使质点减速.
Collisions need not always act to slow particles down.

我们可标记占据某个小领域的质点群.
We label a group of particles occupying a small neighbourhood.

• #α质点