名词
中文翻译：关节帽
同义词：
['joint protector', 'joint guard']
例句：
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1.He wore a knee joint protector during the game to prevent any injuries.
他在比赛中戴了膝盖关节保护器以防止受伤。
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2.The doctor advised him to wear a joint protector while he recovers from his surgery.
医生建议他康复期间戴关节保护器。
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3.The athletes are required to wear joint protectors during the competition.
运动员在比赛期间必须佩戴关节保护器。