selective breeding

音标发音

Thousands of years of selective breeding have produced extensive genetic changes in the plants and animals we eat, not all of them good.
数千年的选择性培育已经造成了食用植物和动物广泛的基因改变，并非所有的改变都是好的。
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。
Selective breeding over time created these wide variations, but the process depended on nature to produce the desired gene.
长时间选择性的培育创造了这些广泛的变种，但是这个过程还是要依赖大自然来产生出所需的基因。

BioHeap, as Titan dubs its process, uses bacteria that the company has developed by selective breeding over the past five years.
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At one time or another, indigenous people in tropical Africa and South America knew how to cultivate and prepare nutritious food by selective breeding of as many as 30, 000 species of plants.
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The last century showed us what the once popular, seemingly scientific idea of eugenics--the belief that we could improve human beings the way we improve animals and plants through selective breeding, planting and culling--led to.
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the process of choosing only plants and animals with desirable characteristics to reproduce