me·di·oc·ri·ty /ˌmidiˈɑkrəti/
  平常,平庸之才
  Me·di·oc·ri·ty n.
  1. The quality of being mediocre; a middle state or degree; a moderate degree or rate. “A mediocrity of success.”
  2. Moderation; temperance. [Obs.]
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  mediocrity
       n 1: ordinariness as a consequence of being average and not
            outstanding [syn: averageness]
       2: a person of second-rate ability or value; "a team of aging
          second-raters"; "shone among the mediocrities who
          surrounded him" [syn: second-rater]