gravitational conveying

例句：

1. 1. The gravitational pull of the Earth is what makesus feel at home.
   地球的引力使我们感到舒适。
2. 2. Gravitational waves havebeen detected in space.
   在太空中已经探测到了引力波。
3. 3. The gravitational force between two objects determines theirdistance apart.
   两个物体之间的引力决定了它们之间的距离。