two-body force

例句：

1. 1. The gravitational force betweenthe planets is a two-bodyforce.
   行星之间的引力是一种双体力。
2. 2.In physics, the two-body force is the force between two objectsthat are moving relative to each other.
   在物理学中，两体力是两个物体相对移动时产生的力。
3. 3. The two-body force model is used to describethe interactions between two particles in a system.
   两体力模型用于描述系统中两个粒子之间的相互作用。