以下是英语中常见的序数词（Ordinal Numbers）： 1st - first 2nd - second 3rd - third 4th - fourth 5th - fifth 6th - sixth 7th - seventh 8th - eighth 9th - ninth 10th - tenth 11th - eleventh 12th - twelfth 13th - thirteenth 14th - fourteenth 15th - fifteenth 16th -...
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