名词
中文翻译：Unknown
同义词：
['subway tunnel', 'subterranean tunnel']
例句：
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1.The underground railway tunnel is a marvel of modern engineering.
这个地下铁路隧道是现代工程的奇迹。
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2. The tunnel was so dark that it felt like we were walking through a black hole.
隧道太黑了，感觉像是走在一个黑洞里。
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3. The tunnel was filled with the sound of rushing water as we made our way to the other side.
在通往另一侧的路上，我们听到了水流的声音。