firstsecondthirdforthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwentiethtwenty-firsttwenty-secondtwenty-thirdtwenty-forthtwenty-fifthtwenty-sixthtwenty-seventhtwenty-eighthtwenty-ninththirtieththirty-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.