名词中文翻译
中文翻译：列车密度
同义词：
['train load', 'train traffic', 'train volume']
例句：
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1.The train is so crowded that it's hard to find a seat.
火车太挤了，找座位都难。
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2. The train company has announced plans to increase the frequency of its services.
火车公司宣布计划增加其服务的频次。
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3.The train density in this area is significantly higher than in other parts of the country.
这个地区的列车密度明显高于全国其他地区。