DICT.TW Dictionary Taiwan

 bed·rock /-ˈrɑk, ˌrɑk/
 岩床,根底,基礎

 bedrock
      n 1: solid unweathered rock lying beneath surface deposits of
           soil
      2: principles from which other truths can be derived; "first
         you must learn the fundamentals"; "let's get down to
         basics" [syn: fundamentals, basics, fundamental
         principle, basic principle]