| 单词 | thirty-first | 
| 释义 | thirty-first1 of 2adjective1   : being number 31 in a countable series  the thirty-first daysee Table of Numbers 2   : being one of 31 equal parts into which anything is divisible  a thirty-first share of the money thirty-first2 of 2 noun" 1   : number 31 in a countable series  the thirty-first of the month 2   : the quotient of a unit divided by 31 : one of 31 equal parts of anything  one thirty-first of the total | 
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