基数词 序数词 1 one 1st first 2 two 2nd second 3 three 3rd third 4 four 4th fourth 5 five 5th fifth 6 six 6th sixth 7 seven 7th seventh 8 eight 8th eithth 9 nine 9th ninth 10 ten 10th tenth 11 eleven 11th eleventh 12 twelve 12th twelfth 13 thirteen 13th...
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