DICT.TW Dictionary Taiwan

 thir·ty /ˈθɝti/
 三十,3030年代;30歲,30到39歲的時期

 Thir·ty a.  Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days.

 Thir·ty n.; pl. Thirties
 1. The sum of three tens, or twenty and ten; thirty units or objects.
 2. A symbol expressing thirty, as 30, or XXX.
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 thirty
      adj : being ten more than twenty [syn: 30, xxx]
      n : the cardinal number that is the product of ten and three
          [syn: 30, XXX]