申请仲裁员回避challenge: n. 1.挑战,挑战书,决斗书;(比赛等的)提议。 2. ...challenge an arbitrator: 申请仲裁回避challenge an opponent to fight: 出阵挑战ground for challenge of an arbitrator: 要求仲裁员回避理由grounds for challenge of an arbitrator: 要求仲裁员回避的理由下载手机词典可随时随地查词查翻译