名词
中文翻译：后卫
同义词：
['end', 'guard', 'safety', 'tackle', 'lineman例句：1. He was a linebacker in the NFL for many years.（他在NFL担任过多年的后卫。）']
例句：
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1. He was a linebacker in the NFL for many years.
他在NFL担任过多年的后卫。
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2. The linebacker made a crucial play on the field.
这位后卫在场上做出了关键性的拦截。
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3.They lined up in a defensive formation, with the linebacker covering the quarterback.
他们排成了防守阵型，后卫负责覆盖四分卫。