以下为句子列表：
英文: Admittedly, already, through our own genotypes, and by our choice of mate, we limit the gene pool available to each child.
中文: 不可否认，由于我们自身的基因类型和我们对配偶的选择，我们已经限制了每一个孩子可获得的基因库。
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英文: But when it comes to voting for a president, the gene pool shrinks rapidly, and the preference is for monikers that are blunt and Anglo-Saxon.
中文: 但是，轮到选举总统时，候选人的基因库就迅速缩小，那些简单明了的古英语中的名字最容易受到青睐。
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英文: Generations of selecting for dogs capable of passing a high level performance and social test have naturally created a gene pool better equipped to produce larger percentages of highly trainable, socially adaptable dogs.
中文: 通过选择有能力通过高水准的考验和社会化测试的犬只，它们将会自然地创造出一个基因库——可以较好地产生高百分比的可训性高社会适应性强的犬只的基因库。
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英文: I wanted to find a way to break the cycle and began to look at experimenting with outcrossing to a new bloodline to give our domestic gene pool a chance to refresh itself.
中文: 我想要找一种打破这种循环的方法，我开始着眼于通过异型杂交而产生一种新的血统的实验，从而给我们这个大家庭的基因库一次更新它们自己的机会。
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英文: Introgression (introgressive hybridization) The introduction of genetic material from one gene pool to another by hybridization and subsequent back-crossing to one or other of the parents.
中文: 渐渗现象（渐渗杂交）：是通过杂交或其后代与某个亲本回交，遗传物质从一个基因库被引入另一个基因库的现象。
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