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公畜不育
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公畜不育
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农学
发情周期
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infertility in male animals
公畜不育
公畜达到配种年龄后缺乏性交能力、无精或精液品质不良,其精子不能使正常卵子受精而引起的完全不育;或者由于各种疾病及缺陷使公畜生育力低于正常水平而导致的生育力低下。
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definite S-integral
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definitionally equal
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