求翻译：2,人类在一代代的自然繁衍中也不断地在优化,其他生物也是如此,如果克隆技术的广泛应用就可能引起生物的单一性,引发许多疾病.是什么意思？

2, natural reproduction of human generations also constantly optimized, so it is with other organisms, if the broad application of cloning technology may cause of biological single, cause many diseases.