名词
中文翻译：地下隧道
同义词：
['subterranean tunnel', "subway tunnel例句：1. The tunnel is so narrow that it's hard to see through the walls.（这个隧道太窄了，以至于你几乎看不到墙壁。）2. The tunnel was used as a secret passage for the underground railroad.（这个隧道被用作地下铁路的秘密通道。）3. The tunnel was discovered during an archaeological dig in the 19th century.（这个隧道是在19世纪的一项考古挖掘中被发现的。）"]
例句：
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1. The tunnel is so narrow that it's hard to see through the walls.
这个隧道太窄了，以至于你几乎看不到墙壁。
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2. The tunnel was used as a secret passage for the underground railroad.
这个隧道被用作地下铁路的秘密通道。
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3. The tunnel was discovered during an archaeological dig in the 19th century.
这个隧道是在19世纪的一项考古挖掘中被发现的。