序数词1到21,和缩写形式:
1、第1 first 1st
2、第2 second 2nd
3、第3 third 3rd
4、第4 fourth 4th
5、第5 fifth 5th
6、第6 sixth 6th
7、第7 seventh 7th
8、第8 eighth 8th
9、第9 ninth 9th
10、第10 tenth 10th
11、第11 eleventh 11th
12、第12 twelfth 12th
13、第13 thirteenth 13th
14、第14 fourteenth 14th
15、第15 fifteenth 15th
16、第16 sixteenth 16th
17、第17 seventeenth 17th
18、第18 eighteenth 18th
19、第19 nineteenth 19th
20、第20 twentieth 20th
21、第21 twenty-first 21st
2 second缩写形式2nd
3 third缩写形式3rd
4 fourth缩写形式4th
5 fifth缩写形式5th
6 sixth缩写形式6th
7 seventh缩写形式7th
8 eighth缩写形式8th
9 ninth缩写形式9th
10 tenth缩写形式10th
1l eleventh缩写形式11th
12 twelfth缩写形式12th
13 thirteenth缩写形式13th
14 fourteenth缩写形式14th
15 fifteenth缩写形式15th
16 sixteenth缩写形式16th
17 seventeenth缩写形式17th
18 eighteenth缩写形式18th
19 nineteenth缩写形式19th
20 twentieth缩写形式20th
21 twenty-first缩写形式21st
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
first (1st)
second (2nd)
third (3rd)
fourth (4th)
fifth (5th)
sixth (6th)
seventh (7th)
eighth (8th)
ninth (9th)
tenth (10th)
eleventh (11th)
twelfth (12th)
thirteenth (13th)
fourteenth (14th)
fifteenth (15th)
sixteenth (16th)
seventeenth (17th)
eighteenth (18th)
nineteenth (19th)
twentieth (20th)