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医学
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reservoir of infection
传染源
体内有病原体生长、繁殖并能将其排出体外的人和动物。
医学
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释
reservoir of infection
传染源
体内有病原体生长、繁殖并能排出病原体的人或动物。
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urban politics
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urban population base of China
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urban population problems in China
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urban population size in the administration area of city
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