名词
中文翻译：地铁隧道
同义词：
['subway tunnel', 'subway tunneling', 'subterranean tunnel']
例句：
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1. Themetro tunnel is a crucial part of the city's transportation system.
地铁隧道是城市交通系统的重要组成部分。
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2. The construction of the new subway tunnel has been ongoing for several years.
新地铁隧道的建设已经进行了几年。
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3.The tunneling process requires careful planning and execution to ensure safety and efficiency.
隧道掘进过程需要仔细规划和执行，以确保安全和效率。