backboned

例句：

1. 1.The backbone of the country's economy is agriculture.
   该国经济的核心是农业。
2. 2. The spine of the building is made of steel.
   这座建筑的脊柱是用钢制成的。
3. 3. He has a backbone of strength and determination.
   他有着坚强的决心和毅力。