gravitational water

例句：

1. 1. The gravitational pull ofthe Earth's gravity is what keepsus on the surface of the planet.
   地球的引力是让我们保持在星球表面的力。
2. 2. Gravitational waves are a new typeof energy that can be detected by advancedspacecraft.
   引力波是一种可以通过先进航天器探测的新型能量。
3. 3. The study of gravitational waves has opened up new possibilitiesfor understanding the universe.
   研究引力波为理解宇宙开辟了新的可能性。