bi·lin·gual /(ˌ)baɪˈlɪŋgwəl ||gjəwəl/
  (a.)雙語的
  Bi·lin·gual a.  Containing, or consisting of, two languages; expressed in two languages; as, a bilingual inscription; a bilingual dictionary. -- Bi*lin*gual*ly, adv.
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  bilingual
       adj : using or knowing two languages; "bilingual education"
       n : a person who speaks two languages fluently