n. position nine in a countable series of things
s. coming next after the eighth and just before the tenth in position
num. 第九, 九分之一
1. She finished in ninth place in the race.
她在比赛中获得了第九名。
2. My birthday is on the ninth of May.
我的生日在五月九日。
3. He is the ninth person to join the team.
他是第九个加入团队的人。