名词
中文翻译：Unknown
同义词：
['rail builder', 'railway builder', 'railroad builder']
例句：
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1. The trailbuilders were responsible for laying the new tracks.
铁路建设者负责铺设新的轨道。
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2. The railroad builders are busy with the construction of the new railway line.
铁路建造者忙于新铁路线的建造工作。
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3. The railroad builders have been working on expanding the network.
铁路建筑者一直在扩建网络。