double vibrations往复振动 virtual device虚拟设备 valvular disease心瓣膜病 physiologic dead space in percent of tidal volume在潮气量的百分比中生理死腔(量) ventrodorsal腹背侧的 ventricular dilator心室扩张器 venous dilatation静脉扩张 physiological dead space生理死腔 apparent volume of distribution表观分布容积 vector diagram向量图 virus diarrhea病毒性腹泻 vessel disease血管病 vasodilation血管舒张 ventriculo dextro(拉)右心室 vitamin d维生素d