elastic impact

• 弹性碰撞

elastic impact的用法和样例：

例句

1. As neutrons pass through matter, they make occasional elastic collisions with nuclei.
   当中子穿过物质时，偶而与核发生弹性碰撞。
2. Additional insight is gained by examining the elastic collision of equally massive particles in the center-of-mass frame of reference.
   对质量相等的两质点的弹性碰撞更彻底的理解，可通过质心参照系而获得。