名词
中文翻译：隧道
同义词：
['tunnel system', 'tunnel group']
例句：
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1.The offspur tunnel is a popular spot for hikers and cyclists.
offspur隧道是徒步者和骑自行车者的热门景点。
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2.The offspur tunnel was built to improve traffic flow in the area.
offspur隧道的建造是为了改善该地区的交通流量。
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3. The offspur tunnel is one of the longest underground tunnel systems in the world.
offspur隧道是世界上最长的地下隧道系统之一。