1 到 100 的序数词和基数词 第 1 first 1st 第 2 second 2nd 第 3 third 3rd 第4 fourth 4th 第 5 fifth 5th 第 6 sixth 6th 第 7 seventh 7th 第 8 eighth 8th 第 9 ninth 9th 第 10 tenth 10th 第 11 eleventh 11th 第 12 twelfth 12th 第 13 thirteenth 13th 第 14 fourteenth 14th 第 15 fifteenth 15th 第 16 sixteenth 16th 第 17 seventeenth 17th 第 18 eighteenth 18th 第 19 nineteenth 19th 第 20 twentieth 20th 第 21 twenty-first 21st 第 22 twenty-second 22nd 第 23 twenty-third 23rd 第 24 twenty-fourth 24th 第 25 twenty-fifth 25th 第 26 twenty-sixth 26th 第 27 twenty-seventh 27th 第 28 twenty-eighth 28th 第 29 twenty-ninth 29th 第 30 thirtieth 30th 第 31 thirty-first 31st 第 32 thirty-second 第 33 thirty-third 第 34 thirty-fourth 第 35 thirty-fifth 第36 thirty-sixth 第 37 thirty-seventh 第 38 thirty-eighth 第 39 thirty-ninth 第 40 fortieth 第 41 forty-first