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barrier methods
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barrier methods
Encyclopedia
医学
外用避孕
释
barrier methods
外用避孕
用物理方法(机械阻挡)不让精子到达子宫腔内,或用化学制剂在阴道内灭活精子,也可两者结合,以此阻挡精、卵相遇而避孕的方法。
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Tribal Assembly
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triband
tribar method
tribasic algebra
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