“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	network database network data envelopment analysis network data examination network data management protocol network data management protocol, NDMP network data model network data visualizatin network degree of node network density network design network design algorithm network development network diameter network diaphragm network dictionary network differences network dimensionality network directory resource collection network distance network document network drama network dynamics network eavesdropping network economy networked control system

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