名词
中文翻译：铁路警卫
同义词：
['railway guard', 'railway policeman', 'railway officer']
例句：
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1. He isa railway guard who patrols the train tracks every day.
他是一名铁路警卫，每天巡逻铁轨。
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2. The railway guard noticed the suspicious activity and alerted the authorities.
铁路警卫注意到了可疑的活动，并通知了当局。
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3. The railway guard was responsible for ensuring the safety of passengers during the journey.
铁路警卫负责确保旅途中乘客的安全。