1~30的英文单词和序数词.

one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty twenty-one twenty-two twenty-three twenty-four twenty- five twenty-six twenty- seventwenty-eight twenty- nine thirty
first second third fourth fifth sixth seventh eighth ninth ten eleventh twelfththirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth twenty-first twenty-tsecond twenty-third twenty-fourth twenty- fifthtwenty-sixth twenty- seventh twenty-eighth twenty- ninth thirtieth