ground thrust

例句：

1. 1. Thespacecraft's ground thrust is sufficient to propel it into orbit.
   宇宙飞船的地面推力足以将其送入轨道。
2. 2.The physicist used the principle of gravitational force to explain the motion of objects.
   物理学家利用万有引力原理解释了物体的运动。
3. 3. The gravitational pull of the moon caused the earth to rotate on its axis.
   月球的重力作用使地球绕轴旋转。