单词：selective breeding
选择育种
selective breeding的用法和样例：
例句
- By selective breeding, it is possible to breed iridescent turquoise, steel blue and royal blue fish with mask features but also to breed metallics with solid black heads.通过选择育种，有可能滋生虹彩绿松石，钢蓝色和皇室蓝鱼罩的功能，而且滋生金属与固体黑色元首。
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