名词
中文翻译：后卫
同义词：
['safety', 'lineman']
例句：
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1.The linebacker was the key player in the game's final drive.
这位后卫是比赛最后冲刺的关键球员。
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2.He played as a safety for the team during the season.
他在赛季期间担任球队的后卫。
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3.The safety is responsible for covering the backfield and preventing injuries.
这位后卫负责防守后场并防止受伤。