名词
中文翻译：水下铁路隧道同义词
同义词：
['underground railway tunnel', 'subterranean railway tunnel']
例句：
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1. The new water-bottom railway tunnel connects the two cities.
新的水下铁路隧道连接了两个城市。
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2. The construction of this underwater railway tunnel has been a major project for years.
这个水下铁路隧道的建设是多年来的主要项目。
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3. Due to its unique design, this underground railway tunnel is considered one of the most innovativein the world.
由于其独特的设计，这个地下铁路隧道被认为是世界上最具创新性的之一。