词汇	ultrasound time
释义	ultrasound time 超声时间
随便看	Emergency Urgent Change Package emergency/urgent coronary artery bypass emergency usage emergency use Emergency Use Only Emergency vaccinate emergency vaccination emergency valve emergency-valve emergency valve closing system emergency valve nut emergency valve piston emergency valve seat emergency vehicle Emergency Vehicle Operators Emergency Vehicle Operators Course Emergency vehicles Emergency vehicles on the scene emergency vent emergency-vent emergency ventilation emergency ventilation shaft Emergency ventilation system emergency ventilator emergency venting