以下为句子列表：
英文: Usually the more unlike the parents are the more hybrid vigor is released, but the effect diminishes in subsequent generations as more recessive homozygotes reappear.
中文: 通常，亲本越不相似，产生的杂种优势越强，但这种优势使下一代的隐性纯合子的出现机率更多。
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英文: Study on Esterase Isozyme and Inter_specific Relationship and Hybrid Vigor in Silkworm(Bombyx mori)
中文: 家蚕酯酶同工酶与品种亲缘关系及杂种优势的研究
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