elastic scattering collision

例句：

1. 1. The elastic scattering of light by molecules is a fundamental property of matter.
   光分子的弹性散射是物质的基本属性。
2. 2. In the elastic scattering process, the particles are scattered in all directions.
   在弹性散射过程中，粒子在所有方向上散射。
3. 3. The elastic scattering of neutrons by protons is used to measure the density of matter.
   质子对中子的弹性散射用于测量物质的密度。