chamn.<古>(蒙古)可汗; 鞑靼王=khan
challengen.挑战;邀请比赛;盘问;质疑v.向 ... 挑战;盘问;质疑
Challengeronn.筛壳虫属
Challengeridaen.筛壳虫科
challenger deep挑战者深渊(是指太平洋马里亚纳海沟最深处,深约11000米,同时也是世界上海洋最深的地方)
Challengerondiodenn.双齿筛壳虫
Challenger Expeditio挑战者号科学考察
Challengeronwillemoesiin.威氏筛壳虫
Challenger Training Tank挑战者训练坦克
Challengers to Track and Field田径运动面临的挑战
"he had respect for his rivals"
"he wanted to know what the competition was doing"