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1·Eventually the subpopulations become so genetically distinct that they cannot interbreed even if the physical barriers between them were removed.

最终，这些亚种群在基因上变得如此不同，以至于即使消除了它们之间的物理障碍，它们也无法杂交。

2·High rates of straying can be problematic because misdirected fish may interbreed with the existing stock to such a degree that any local adaptations that are present become diluted.

高偏离率可能是一个问题，因为被误导的鱼可能会与现有种群杂交，而这种杂交的程度会稀释现有的任何当地适应能力。

3·These species do not interbreed.

这些物种不能杂交。

4·Some migrated finding one another and began to interbreed.

有些人迁移而发现另一个种族并开始混血。

5·Since the birds interbreed they cannot be classed as different species.

由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。

6·Since the birds interbreed they cannot be classed as different species .

由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。

7·It enables scientists to transfer genes between different species that would not interbreed in nature.

它使科学家转移基因不会混种本质上的区别种类之间。

8·It enables scientists to transfer genes between different species that would not interbreed in nature.

它使科学家之间的转移基因的不同物种，不会杂交的性质。

9·You could have two genuine species, whose members cannot interbreed, but whose genomes are very similar.

你可能有两个纯正的物种，两者无法通婚，不过他们的基因组非常相近。

10·They were rare , and the pure - strain wild turkeys had begun to interbreed with farmers domestic stock.

纯种野火鸡已经和农户的家养火鸡混种，品种质量有所下降。