“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	syntactic connection syntactic consistency syntactic definition syntactic exchange syntacticization syntactic language syntactic language model syntactic metalanguage syntactic pattern recognition syntactic picture parsing syntactic reconstruction syntactic rule syntactics syntactic structural ambiguity syntactic structure syntactic subordination tree syntactic system syntactic theorem syntactic tree syntactic type calculus syntactic valence syntactic variable Syntatic Patterns in Modern Chinese syntax syntax analysis

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