12~23和100的英语基数次词和序数词

12twelve,13thirteen,14fourteen,15fifteen,16sixteen,17seventeen,18eighteen,19nineteen,20twenty,21twenty-one,22twenty-two,23twenty-three,100hundred

序数词：12:twelfth ,20:twentith,21:twenty-first,22:twenty-second,23:twenty-third,其余的都在基数词后加th.

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