“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	obstacle problem obstacle scattering obstacles to policy termination obstacle vehicles OB star obstertrics-gynecology hospital（Maternity Hospital） obstetrical procedure in female livestock obstetric and gynecologic clamp obstetric and gynecologic hook & needle obstetric and gynecologic knife obstetric and gynecologic scissors obstetric and gynecologic surgical operation instruments obstetric and gynecologic tweezer & clip obstetric apparatus for domestic animals Obstetrician obstetrician's hand obstetric ultrasonography obstinate arthralgia obstruction obstruction class obstruction cocycle obstruction LED obstruction of evidence obstruction of intestines obstruction of the oesophagus

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