名词
中文翻译：铁路轴心
同义词：
['railway center', 'railway axis']
例句：
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1.The railway axis is the main line that connects two cities.
铁路轴心是连接两个城市的主干线。
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2. The railway axis runs through the heart of the city.
铁路轴心穿过市中心。
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3. The railway axis is a crucial part of the transportation network.
铁路轴心是交通网络中至关重要的一部分。