So, in fact, not only is gravity unintelligible as we saw last time many philosophers at the time wanted to say, actually even mechanical causation is pretty unintelligible too.

事实上，我们上节课提到过，当时很多的哲人都提出万有引力是晦涩难懂的，即便是机械论的因果关系也是非常难理解的。

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In fact uniformity of nature is the result of the principle of causation.

事实上统一的性质是由于原则的因果关系。

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This paper sets forth the fact that the eccentric action of coil spring is an important factor in the causation of abnormal vibration of vehicle and severe wear on bolster guide.

本文指出螺旋弹簧有偏离中心的弹性作用，是引起车辆不正常振动和摇枕纵向挡严重磨损的一个重要因素。

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