back·bone/`bæk`bon; ˈbækbəʊn/ n 1 the backbone of the most important part of something 〔某物的〕骨干; 中坚,支柱: The cocoa industry is the backbone of Ghana's economy. 可可粉产业是加纳经济的支柱。 2 [C] the bone down the middle of your back; SPINE 脊骨,脊柱 3 [U] courage and determination 毅力; 骨气