“barrier methods”的概念、定义、翻译、参考文献-科学参考

单词	barrier methods
释义	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。
随便看	singular control singular coordinate singular correlation singular correspondence singular critical lattice singular cube singular curve singular cycle singular direction singular distribution singular divisor singular element singular element of a Lie algebra singular elliptic function singular endomorphism singular endpoint singular equation singular exponent singular extension singular extremal singular factor singular fiber singular focus singular form singular function

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