a drug runner的用法和样例：
- The police tried to prevent infiltration by drug traffickers.
a drug runner的相关资料：
aosmic a a murmur of agreement/approval/complaint a graduate/postgraduate/research student a beauty/an ice-cream/a funeral parlor a light/dry/sharp/conversational tone a well-thought-out and consistent argument a temporary measure/solution/arrangement a tennis player/tournament/club/court A good American English radio---VOA? a scientist knowledgeable about cosmography. a succession of events/problems/visitors