backbonen.

英 'bækbəʊn | 美 'bæk'bon

中文n. 支柱；主干网；决心，毅力；脊椎

词根词源

backbone (n.)"spine," early 14c., from back (n.) + bone (n.). Figurative sense of "strength of character" is attested from 1843.

关键词

backbone