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BNC: 17456 COCA: 19139
joist
noun [C] /dʒɔɪst/
singularjoist
pluraljoists
  1. a long piece of wood or metal put below a floor or ceiling to support it (支承地板或天花板的)搁栅,托梁,桁,檩
     Synonyms and related words
    Frames and supports for structures: frame, foundation, support...

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