万有引力

例句：

1. 1. The Earth's gravity pulls the Moon towards it.
   地球的重力把月球拉向它。
2. 2. The law of universal gravitation states that all objects attract each other with a force.
   万有引力定律表明，所有物体都以一个力相互吸引。
3. 3. Gravitational waves are ripples in space-time caused by the motion of massive objects.
   引力波是空间时间中由于大质量物体的运动产生的波动。