negativity
  否定性,消極性
  neg·a·tiv·i·ty /ˌnɛgəˈtɪvətɪ/ 名詞
  負性
  Neg·a·tive·ness, Neg·a·tiv·i·ty  n. The quality or state of being negative.
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  negativity
       n 1: the disagreeable quality of one who dissents [syn: negativeness]
            [ant: positiveness]
       2: characterized by habitual skepticism and a tendency to deny
          or oppose or resist suggestions or commands [syn: negativism]
          [ant: positivism]
       3: (chemistry) the tendency of an atom or radical to attract
          electrons in the formation of an ionic bond [syn: electronegativity]