Also, most remarkably, we have seen no new animal species emerge in domesticbreeding.
而且,最值得注意的是,人类在对动物的驯养过程中,也未见有任何新的物种出现。
2
Many scientists agree that the domestic dog displays more morphological variation than any other known species, thanks to selective breeding by humans.
许多科学家都认为,国内的狗更显示形态比任何其他已知的物种变异,人类有选择育种的感谢。
3
Increased demand for animal products has also led to the breeding of more genetically uniform domestic animal populations that are more vulnerable to pathogens, he says.