ri·val·ry /ˈraɪvəlri/
  敵對,競爭,對抗
  ri·val·ry /ˈraɪvəlrɪ/ 名詞
  拮抗,競爭,抗衡,匹敵
  Ri·val·ry n.; pl. Rivalries  The act of rivaling, or the state of being a rival; a competition. “Keen contention and eager rivalries.”
  Syn: -- Emulation; competition. See Emulation.
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  rivalry
       n : the act of competing as for profit or a prize; "the teams
           were in fierce contention for first place" [syn: competition,
            contention] [ant: cooperation]