名词
中文翻译：军营中的值班士兵
同义词：
['camp guard', 'sentry例句：1. The camp was full of activity as the soldiers were on duty.（营地里活动繁忙，士兵们正在值勤。）']
例句：
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1. The camp was full of activity as the soldiers were on duty.
营地里活动繁忙，士兵们正在值勤。
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2.The sentries patrolled the perimeter to ensure no trespassers entered.
哨兵巡逻边界，确保没有未经允许的人进入。
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3. The camp guard had just finished a long shift and was now resting in the shade.
营地警卫刚刚完成了漫长的班次，现在正坐在树荫下休息。