词典释义：
a series of vertebrae extending from the skull to the small of the back, enclosing the spinal cord and providing support for the thorax and abdomen; the backbone
脊柱。
〈喻〉 中心力量；中流砥柱
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players who will form the spine of our side 将成为我们队主力的运动员
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Puerto Rico's mountainous spine. 波多黎各岛的中心山地。
[mass noun]
〈喻〉 骨气；坚定；勇气。
the part of a book's jacket or cover that encloses the inner edges of the pages, facing outwards when the book is on a shelf and typically bearing the title and the author's name
书脊。
(亦作
直线型薪酬级别制（大型机构实行的一种薪酬级别制，薪酬因地区及具体情况的不同而有所变化）。
【动，植】 棘，刺（如刺猬和海胆的刺）；鱼鳍的刺；植物上的刺。
【地质】 火山栓，熔岩塔。
"late Middle English： shortening of Old French
