资料来源 : pyDict

挑战者

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Challenger \Chal"len*ger\, n.
   One who challenges.

资料来源 : WordNet®

challenger
     n : the contestant you hope to defeat; "he had respect for his
         rivals"; "he wanted to know what the competition was
         doing" [syn: {rival}, {competitor}, {competition}, {contender}]