first second third forth fifth sixth seventh eighth ninth tenth eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth twenty-first twenty-second twenty-third twenty-forth twenty-fifth twenty-sixth twenty-seventh twenty-eighth twenty-ninth thirtieth thirty-first
一般类似于第二十一，第二十二，第二十三，第二十四……这样的表达都是用21st，22nd，23rd，24th……来表达，只有逢整十这样的数不一样。
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