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来源:雅诚德英语网
Presumably, different mutations were available in each population for natural selection to work on.
为了使自然选择得以进行,不同的变异对于各类人种大概都是适用的。
Presumably, different mutations were available in each population for natural selection to work on.
为了使自然选择得以进行,不同的变异对于各类人种大概都是适用的。