自然界的运动遵从规律。恩格斯说：“一切运动的基本形式都是接近和分离、收缩和膨胀”。接近和分离是有极限的，收缩和膨胀也是有极限的，事物运动的极限就转向对立的另一极。接近──分离──接近──分离……收缩──膨胀——收缩──膨胀……宇宙的这种基本运动形式体现着 The movement of nature follows the law. Engels said: “The basic forms of all movements are approaching and separating, contracting and expanding.” There is a limit to approach and separation. There is also a limit to contraction and expansion, and the limits of things move to the opposite pole. Close to - Separation - Close to - Separation ... Shrinkage - Expansion - Shrinkage - Expansion ... This basic form of movement in the universe manifests