backbone基本解释
n,支柱；主干网；决心，毅力；脊椎,同近
Farmers are the backbone of this community..农场主是这个团体的中坚力量。
支柱；主干网；决心，毅力；脊椎英释中释nthe row of connected bones that go down the middle of your back
to the backbone,完完全全；彻头彻尾.短语
