zero momentum system

例句：

1. 1.The zero momentum system is a theoretical model that describes the motion of particles in a vacuum.
   零动量系统是一个描述粒子在真空中运动的理论上的模型。
2. 2. In the zero momentum system, the particles are moving at constant velocity without any external force.
   在零动量系统中，粒子以恒定速度运动，不受任何外力影响。
3. 3. The zero momentum system is used to study the behavior of particles in extreme conditions, such as high temperatures or strong magnetic fields.
   零动量系统用于研究在极端条件下粒子的行为，如高温或强磁场。