text·book /ˈtɛks(t)ˌbʊk/
  課本,教科書
  textbook
       adj : according to or characteristic of a casebook or textbook;
             typical; "a casebook schizophrenic"; "a textbook
             example" [syn: casebook]
       n : a book prepared for use in schools or colleges; "his
           economics textbook is in its tenth edition"; "the
           professor wrote the text that he assigned students to
           buy" [syn: text, text edition, schoolbook, school
           text] [ant: trade book]