backbone

noun
🔊/ˈbækbəʊn/
🔊/ˈbækbəʊn/
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  1. [countable] the row of small bones that are connected together down the middle of the back脊梁骨;脊柱
    synonym spineTopics Bodyb1
  2. [singular] the most important part of a system, an organization, etc. that gives it support and strength支柱;骨干;基础
    • Agriculture forms the backbone of the rural economy.农业是农村经济的基础。🔊🔊
  3. [uncountable] the strength of character that you need to do something difficult毅力;骨气
    • He doesn't have the backbone to face the truth.他没有面对现实的勇气。🔊🔊