pos·si·bil·i·ty /ˌpɑsəˈbɪləti/
  可能性,可能的事
  Pos·si·bil·i·ty n.; pl. Possibilities
  1. The quality or state of being possible; the power of happening, being, or existing. “All possibility of error.” --Hooker. “Latent possibilities of excellence.”
  2. That which is possible; a contingency; a thing or event that may not happen; a contingent interest, as in real or personal estate.
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  possibility
       n 1: a future prospect or potential; "this room has great
            possibilities"
       2: capability of existing or happening or being true; "there is
          a possibility that his sense of smell has been impaired"
          [syn: possibleness] [ant: impossibility]
       3: a tentative theory about the natural world; a concept that
          is not yet verified but that if true would explain certain
          facts or phenomena; "a scientific hypothesis that survives
          experimental testing becomes a scientific theory"; "he
          proposed a fresh theory of alkalis that later was accepted
          in chemical practices" [syn: hypothesis, theory]
       4: a possible alternative; "bankruptcy is always a possibility"
          [syn: possible action, opening]