这是他们自然的运动规律。

That is there natural motion.

youdao

如你所知，沉积物是通过风、水流或冰川运动等自然过程输送的物质，如沙子、砾石、化石碎片等。

Sediment as you know, is material like sand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.

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环保运动是大自然重要性得到广泛认可的明证。

The environmental movement is testimony to the widespread feelings of support for nature's importance.

《柯林斯英汉双解大词典》

From one point of view, reading Hobbes, his account of the state of nature seems to derive from his physics of motion and rest, in the opening chapters of Leviathan.

一方面，阅读霍布斯，他关于自然状态的解释似乎,来源于他关于运动和静止的物理学，这也在《利维坦》的开篇章节。

耶鲁公开课 - 政治哲学导论课程节选