注：中间是基数词,最后一个是序数词
1,one ,first
2,two ,second
3,three ,third
5,five ,fifth
8,eight ,eighth
9,nine ,ninth
11,eleven ,eleventh
12,twelve ,twelfth
15,fifteen ,fifteenth
18,eighteen ,eighteenth
19,nineteen ,nineteenth
20,twenty ,twentieth
24,twenty-four ,twenty-fourth
29,twenty-ninth
33,thirty-three ,thirty-third
42,forty-two ,forty- second
50,fifty ,fiftieth
88,eighty-eight ,eighty-eighth
91,ninety-one ,ninety-first
100,hundred ,hundredth