externalityn.外表；外在性；外部的事物；外部因素externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external defibrillator体外除颤器external carotid nerve颈外动脉神经external accreditation校外人员评审external decimal digit外部十进制数external photoemission外光电发射external coconut piece阳三角(配件砖)external-ear squeeze外耳挤压伤external male catheter男用体外导尿袋external scleral sulci外巩膜沟external fragmentation外部碎片