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underground tunnel

US 
UK 
  • n.坑道
  • Web地下隧道;地下坑道;地下巷道
n.
1.
坑道

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Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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