名词
中文翻译：重力锁
同义词：
['gravity catch', 'gravity hold']
例句：
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1. The weight of the earth's gravity holds the planets in their orbits.
地球的重力将行星保持在轨道上。
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2. The gravity lock is a device that prevents objects from falling through a hole in the floor.
重力锁是一种防止物体穿过地板孔掉落的设备。
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3. The gravity lock was designed to prevent people from falling through the gap in the ceiling.
重力锁被设计来防止人们穿过天花板上的缝隙。