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阿拉伯数字
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基数词
缩写格式
序数词
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first
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eleventh
twelfth
thirteenth
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sixteenth
seventeenth
eighteenth
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twenty-first
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zero/nought/nothing
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one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
twenty
twenty-one
thirty
forty
fifty
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
11th
12th
13th
14th
15th
16th
17th
18th
19th
20th
21st
30th
40th
50th