基数词和序数词的转化.first（基数词）ninth(基数词）two(序数词）eight（序数词）third（基数词）twenty（序数词）tweive（序数词）
问题描述：
基数词和序数词的转化.
first（基数词）ninth(基数词）two(序数词）eight（序数词）third（基数词）twenty（序数词）tweive（序数词）
答
one nine second eighth three twentieth twelfth
答
first--one ninth---nine two----second eight---eighth third----three twenty---twentith twelve--twelfth
答
one
nine
second
eighth
three
twentieth
twelfth