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.