book·worm /ˈbʊkˌwɚ/
  書獃子,蛀書蟲
  Book·worm n.
  1. Zool. Any larva of a beetle or moth, which is injurious to books. Many species are known.
  2. A student closely attached to books or addicted to study; a reader without appreciation.
     I wanted but a black gown and a salary to be as mere a bookworm as any there.   --Pope.
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  bookworm
       n 1: a person who pays more attention to formal rules and book
            learning than they merit [syn: pedant, scholastic]
       2: someone who spends a great deal of time reading