第一天到第十天的英文the first day, the second day, the third day, the fourth day , the fifth day, the sixth day, the seventh day, the eighth day，
the ninth day 第九天
the tenth day 第十天
比如
the eleventh day 第十一天
the twelfth day第十二天
the thirteenth day第十三天
the fourteenth day第十四天
the fifteenth day第十五天
