elastic collision的用法和樣例：
例句
- As neutrons pass through matter, they make occasional elastic collisions with nuclei.
當中子穿過物質時，偶而與核發生彈性碰撞。 - Additional insight is gained by examining the elastic collision of equally massive particles in the center-of-mass frame of reference.
對質量相等的兩質點的彈性碰撞更徹底的理解，可通過質心參照系而獲得。
