Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively feeble, making gravitational waves hard to detect.
和宇宙中的其他三种力(电磁力、弱核力、强核力)相比，重力就微弱得多了，所以引力波很难被观测。
Like any natural force, gravity pull can work with us or against us.
习惯的引力如同自然界所有的力量一样，可以为我们所用，也可能危害我们。
Like any natural force, gravity pull can work with us or against us.
与其他自然力一样，地心引力对我们而言，是助力，亦可是对抗力。
Like any natural force, gravity pull can work with us or against us.
与其他自然力一样，地心引力对我们而言，是助力，亦可是对抗力。
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