gravity test

例句：

1. 1. The engineer conducted a gravity test on the new machine before it was put into use.
   工程师在机器投入使用前对其进行了重力测试。
2. 2. The scientist performed a gravity test to determine the density of the material.
   科学家进行了重力测试，以确定材料的密度。
3. 3.During the gravity test, the scientists observed that the object fell at an unusually high speed.
   在进行重力测试时，科学家们观察到物体以异常高的速度下落。