DICT.TW Dictionary Taiwan

 ra·tio·nale /ˌræʃəˈnæl/
 基本原理

 Ra·tion·a·le n.  An explanation or exposition of the principles of some opinion, action, hypothesis, phenomenon, or the like; also, the principles themselves.
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 rationale
      n : (law) an explanation of the fundamental reasons (especially
          an explanation of the working of some device in terms of
          laws of nature); "the rationale for capital punishment";
          "the principles of internal-combustion engines" [syn: principle]