external lip外唇externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external-cavity diode laser外腔半导体激光器External gingival lamina dura外龈硬板external fixed rate pacemaker体外固定频率起搏器external and internal culture中外文化external genital polyhidrosis阴汗External ventrieular drainage脑室外引流external auditory canal curet外耳道用刮匙External wood splint fixation夹板外固定external cause of the purpose目的外因external synchronizing signal外同步信号