n.脊梁骨，脊椎;分水岭;支柱;决心，毅力;
backbones例句:
1、
You might be taking drastic measures and you've got to have the backbone to do that.
你也许要采取极端的措施，你必须有勇气那么做。
《柯林斯高阶英汉双解学习词典》
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