1-31序数词和音标如下:
1、[fə:st] first(1st)
2、['sekənd] second( 2nd)
3、[θə:d] third( 3rd)
4、[fɔ:θ] fourth(4th)
5、[fifθ] fifth(5th)
6、[siksθ] sixth( 6th)
7、['sevnθ] seventh( 7th)
8、[eitθ] eighth(8th)
9、[nainθ] ninth(9th)
10、[tenθ] tenth(10th)
11、[i'levnθ] eleventh (11th)
12、[twelfθ] twelfth (12th)
13、['θə:ti:nθ] thirteenth (13th)
14、['fɔ:'ti:nθ] fourteenth (14th)
15、['fif'ti:nθ] fifteenth (15th)
16、['siks'ti:nθ] sixteenth (16th)
17、[,sevn'ti:nθ] seventeenth (17th)
18、['ei'ti:nθ] eighteenth (18th)
19、['nain'ti:nθ] nineteenth (19th)
20、['twentiiθ] twentieth (20th)