externals外控者externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external event外部事件external signs表征external tooth外齿external walls外墙External fuses外熔断器external naris外鼻孔external value对外价值external traden.对外贸易；外贸external space外空间external label外部标记