gravitational field equations

例句：

1. 1.The equations of motion describe the behavior of objects in space.
   运动方程描述物体在空间中的行为。
2. 2. The gravitational force between two bodies is determined by their masses and distance.
   两个物体之间的引力是由它们的质量和距离决定的。
3. 3. Gravitational waves are a new type of particle that can travel through space.
   引力波是一种新型的粒子，可以穿越空间。