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The more specific idea of Evolution now reached is - a change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.

现在达到的关于进化的更具体的观点是——从一种不确定的、不连贯的均匀性到一种明确的、连贯的异质性的变化，伴随着运动的耗散和物质的整合。

— Herbert Spencer 赫伯特·斯宾塞