eq·ui·ta·tion /ˌɛkwəˈteʃən/
  騎馬,騎術
  Eq·ui·ta·tion n.  A riding, or the act of riding, on horseback; horsemanship.
     The pretender to equitation mounted.   --W. Irving.
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  equitation
       n : riding a horse as a sport [syn: riding, horseback riding]