ax·i·om /ˈæksiəm/
  自明之理,公理,格言
  axiom
  公理
  Ax·i·om n.
  1. Logic & Math. A self-evident and necessary truth, or a proposition whose truth is so evident as first sight that no reasoning or demonstration can make it plainer; a proposition which it is necessary to take for granted; as, “The whole is greater than a part;”  “A thing can not, at the same time, be and not be.”
  2. An established principle in some art or science, which, though not a necessary truth, is universally received; as, the axioms of political economy.
  Syn: -- Axiom, Maxim, Aphorism, Adage.
  Usage: An axiom is a self-evident truth which is taken for granted as the basis of reasoning. A maxim is a guiding principle sanctioned by experience, and relating especially to the practical concerns of life. An aphorism is a short sentence pithily expressing some valuable and general truth or sentiment. An adage is a saying of long-established authority and of universal application.
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  axiom
       n 1: a saying that widely accepted on its own merits [syn: maxim]
       2: (logic) a proposition that is not susceptible of proof or
          disproof; its truth is assumed to be self-evident