名词
中文翻译：国家铁路公司
同义词：
['national railroad', 'national railway system']
例句：
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1.The national railway company is responsible for maintaining the safety of passengers and cargo.
国家铁路公司负责维护乘客和货物的安全。
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2.The national railway company has been working on a new project to improve the efficiency of the transportation system.
国家铁路公司一直在努力开发一个新的项目，以提高交通系统的效率。
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3.The national railway company announced that it would invest in renewable energy sources to reduce its carbon footprint.
国家铁路公司宣布将投资可再生能源，以减少其碳足迹。