名词
中文翻译：守卫
同义词：
['soldiers', 'guardsmen', 'sentinels例句：1. The guards at the gate were very alert.（门口的守卫非常警觉。）']
例句：
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1. The guards at the gate were very alert.
门口的守卫非常警觉。
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2.The guards had to be careful not to let anyone in.
守卫们必须小心，不要让人进来。
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3. The guards patrolled the area around the castle.
守卫们在城堡周围的区域巡逻。