back bone

US 
UK 
  • un.天幕脊梁;脊柱
  • Web骨干;脊椎骨;分水岭
un.
1.
天幕脊梁
2.
脊柱

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