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main line

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UK 
  • n.(城际)铁路主干线
  • Web主线;正线;干线联接
Plural Form:main lines  
main line
n.
1.
(城际)铁路主干线an important railway/railroad line between two cities

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