Backbone

来自Big Physics
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wiktionary

ref

From Middle English bakbon, bakebon, bac-bon; equivalent to back +‎ bone. Compare the semantically analogous English ridgebone.


etymonline

ref

backbone (n.)

"spine, vertebral column," early 14c., from back (n.) + bone (n.). Figurative sense of "firmness of purpose, strength of character" is by 1843.

取自“https://www.bigphysics.org/index.php?title=Backbone&oldid=29163”