自然界不论就它的整体来看,或者就它的各个局部来看,都处在不断地运动、变化、发展之中。我们所认识到的自然界的各个层次,都是自然界历史发展的结果。正如恩格斯所说:“世界不是一成不变的事物的集合体,而是过程的集合体”(《马克思恩格斯选集》第4卷第240页)。“整个自然界,从最小的东西到最大的东西,从沙粒到太阳,从原生生物到人,都处于永恒的产生和消灭中,处于不断的流动中,处于无休止的运动和变化中”。(《自然辩证法》1984年版第15页)恩格斯根据十 Nature, in its totality, or in its various parts, is constantly moving, changing, and developing. The various levels of nature we recognize are the result of the historical development of nature. As Engels put it: “The world is not an assembly of immutable things, but an assembly of processes” (Selected Works of Marx and Engels, vol 4, p 240). “The whole of nature, from the smallest to the largest, from sand to the sun, from primitive creatures to human beings, is in eternal birth and extinction, in constant flux and endlessly moving and changing.” (Dialectics of Nature, 1984, p. 15) According to Engels