词汇	Stucture Learning
释义	Stucture Learning 结构学习
随便看	challenge principle challenge procedure challenger challenger deep Challenger disaster challenge-reply test challenge respect Challenge Response challenge-response challenge response authentication mechanism challenge-response authentication mechanism challenge-response identification challenge-response protocol challenge-response system Challenger Expeditio Challenger Expedition Challenger Fracture Zone Challengeridae Challengeron Challengerondioden Challengeronwillemoesii challenge round Challenger Plateau challengers Challengers to Track and Field