external aim外部的目的externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external orifice of uterus子宫外口external interface adapter外部接口适配器external finishing material外部精加工材料external limiting membranes[医] 外界膜external payments situation国际收支情况external sulcus capillaries外(螺旋)沟微血管(与血管纹相通)external popliteal ligament腘弓状韧带支持带externally maintained field外保持场external monitoring circuit外部监视电路External Information Bureau对外情报局