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垂直传播
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垂直传播
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垂直传播
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vertical transmission
垂直传播
病原体通过亲代传播给子代的过程。通常指孕妇分娩前和分娩过程中,母亲将病原体传给胚胎、胎儿及新生儿的过程,又称母婴传播(mother-to-child Transmission; MTCT)、围产期传播(perinatal transmission)。
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video key frame extraction
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video keyframe extraction
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