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基因缺失活疫苗
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基因缺失活疫苗
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基因工程
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gene deleted live vaccine
基因缺失活疫苗
用基因工程技术将病原体中与毒力相关的基因删除或突变,使之毒力减弱甚至消失,但仍然保留其抗原性及一定的复制和感染能力,从而能够自然感染宿主细胞并产生免疫反应的疫苗。
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period-color relation
period conjecture
period-density relation
period determination
period discontinuity
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period doubling
period doubling bifurcation
period-doubling bifurcation
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periodic acid
periodic acid-Schiff reaction
periodic acid-Schiff reaction (PAS reaction)
periodical
periodical bibliography
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periodical cicada
periodical layout design
periodically correlated
periodically poled silica fiber
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