cerebration
  腦髓作用,思考
  cer·e·bra·tion /ˌsɛrəˈbreʃən/ 名詞
  腦活動,精神活動
  Cer·e·bra·tion n. Action of the brain, whether conscious or unconscious.
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  cerebration
       n : the process of thinking (especially thinking carefully);
           "thinking always made him frown"; "she paused for
           thought" [syn: thinking, thought, intellection, mentation]