名词
中文翻译：后卫
同义词：
['back', 'rear guard例句：1. The team needs a left back to cover the space in the midfield.（球队需要一个左后卫来填补中场的空间。）']
例句：
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1. The team needs a left back to cover the space in the midfield.
球队需要一个左后卫来填补中场的空间。
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2.The coach will rotate his players regularly to keep them fresh for the next match.
教练会定期轮换球员，让他们为下一场比赛保持新鲜。
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3. The left back made a crucial tackle that helped secure the victory for the team.
这位左后卫做出了关键的铲球，帮助球队赢得了比赛。