spine  
noun [ C ] uk/spaɪn/ us/spaɪn/
  (BONE)      
 C1 脊柱;脊椎
the line of bones down the centre of the back that provides support for the body and protects the spinal cord
  She injured her spine in a riding accident. 她在一次坠马事故中脊柱受伤。 
figurative The Apennine mountains form the spine (= central row of mountains) of Italy. 亚平宁山脉是意大利的中心山脉。 
 - More examples
 - Age deforms the spine.
 - Injuries to the spine are common amongst these workers.
 - The doctor manipulated the base of my spine and the pain disappeared completely.
 - The lower part of her spine was crushed in the accident.
 - At its most terrifying, his writing sends shivers up and down my spine.
 
  (POINT)     
  (刺猬等动物的)刺毛;(仙人掌等植物的)刺
a long, sharp point like a needle growing out of an animal such as a hedgehog or a plant such as a cactus
   (BOOK PART)     
 书脊
the narrow strip where the cover of a book is joined to the pages, usually with the title and writer's name printed on it