backbone
definitions
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noun
the main supporting structure of the spine; a person or thing that provides strength or supportzh: 脊柱;骨干
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noun
a strong, flexible rod used in constructionzh: 建筑用的钢梁
examples
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She is the backbone of the team.
她是团队的骨干。
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The roof rests on a steel backbone.
屋顶靠在一根钢梁上。