;
;
;Evolution is regarded as a branching process, whereby populations are altered over time and may speciate into separate branches, hybridize together, or terminate by extinction.
视为一个
枝过程；随着时间的推移，
群发生改变，群也可能成为枝，也可能相互杂交或灭绝终止。
）形成物Evolution is regarded as a branching process, whereby populations are altered over time and may speciate into separate branches, hybridize together, or terminate by extinction.
视为一个枝过程；随着时间的推移，群发生改变，群也可能成为枝，也可能相互杂交或灭绝终止。
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