challengen.挑战;邀请比赛;盘问;质疑v.向 ... 挑战;盘问;质疑
challenge infection攻击感染, 攻击性感染
challenge and reply询问与应答
challenge ourselves挑战自我
challenge comparison挑战
challenge parameters口令参数
challenged personnel被申请回避的人员
challenge experiment攻击试验
challenge suggestion查问暗示
challenge for a ball抢球
challenge-response挑战-应答