threes序數詞

序數詞是third，例如：

1、I was pregnant with our third child at the time.當時我正懷着我們的第三個孩子。

2、The third book in the series is currently in preparation.叢書的第三冊現在正準備出版。

3、Their horse came third in the race last year.他們的馬在去年的比賽中獲得了第三名。