twentytwentieth, fortyfortieth。
③以one, two, three, five, eight, nine收尾的多位数词,要照第一条办法变。例如:
twenty-onetwenty-first, twenty-twotwenty-second,
thirty-fivethirty-fifth, ninety-nineninety-ninth
a hundred and fifty-threehundred and fifty-third
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