如果你问的是每个的意思的话,那就是：
20 twentieth
21 twenty-first
22 twenty-second
23 twenty-third
24 twenty-fourth
25 twenty-fifth
26 twenty-sixth
27 twenty-seventh
28 twenty-eighth
29 twenty-ninth
30 thirtieth
31 thirty-first
32 thirty-second
33 thirty-third
34 thirty-fourth
35 thirty-fifth
36 thirty-sixth
37 thirty-seventh
38 thirty-eighth
39 thirty-ninth
40 fortieth
如果就是问第20到第40 这句,那应该是：
from the twentieth to the fortieth