backbone

n. 脊椎,志气

The backbone is an articulate structure.
脊椎骨是一种关节相连的结构。
He has no backbone.
他没有骨气。
These men are the backbone of the country.
这些人是国家的中坚力量。

形容词:backboned

名词 backbone:

a central cohesive source of support and stability
同义词：anchor, mainstay, keystone, linchpin, lynchpin
fortitude and determination
同义词：grit, guts, moxie, sand, gumption
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
同义词：spinal column, vertebral column, spine, back, rachis
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved
同义词：spine
the part of a network that connects other networks together