n.序数词(如第一、第二等)
adj.序数的

原形：ordinal复数：ordinals

Today is the tenth of February.
今天是二月十日。
He finished in fourth place in the marathon.
他在马拉松比赛中获得了第四名。
She has been married for the seventh year.
她已经结婚七年了。
The company's fifth anniversary celebration is next week.
公司的五周年庆典将在下周举行。
We're expecting our ninth visitor any minute now.
我们预计第九位访客随时会到。
This is my third attempt at this test.
这是我第三次尝试这个测试。
The baby is in her eighth month of pregnancy.
孩子已经怀孕八个月了。
The team scored their second goal in the match.
队伍在比赛中进了他们的第二个球。
He was appointed to his first managerial position in his thirtieth year.
他在他第三十年的时候被任命为他的第一个管理职位。
My appointment with the dentist is on the twelfth of next month.
我和牙医的预约是在下个月十二号。