gravitational vectors

例句：

1. 1.The gravitational vector is a crucial factor in determining the trajectory of an object.
   引力向量是决定物体轨迹的关键因素。
2. 2.Gravitational vectors are used to calculate the force between two objects.
   引力向量用于计算两个物体之间的力。
3. 3. The gravitational vectors are calculated using the laws of gravity.
   引力向量是通过万有引力定律计算得出的。