ord.第三十
n.第三十，三十分之一

原形：thirtieth复数：thirtieths

Today is my thirtieth birthday.
今天是我三十岁的生日。
She celebrated her thirtieth wedding anniversary with a grand party.
她以盛大的聚会庆祝了结婚三十周年。
He just landed his thirtieth client for the law firm.
他为律师事务所拉到了第三十个客户。
This is the thirtieth time I've reminded you to do your homework.
这是我第三十次提醒你做作业了。
The thirtieth Olympic Games will be held in London.
第三十届奥运会将在伦敦举行。
She published her thirtieth novel at the age of 50.
她在五十岁时出版了她的第三十部小说。
We marked our thirtieth year in business with a company-wide celebration.
我们用全公司的庆祝活动来纪念我们经营的第三十年。
The thirtieth anniversary of the company's founding was a grand affair.
公司成立三十周年的庆祝活动非常盛大。
His thirtieth goal of the season secured the championship for his team.
他本赛季的第三十个进球为他的队伍确保了冠军。
She completed her thirtieth marathon, an impressive achievement for anyone.
她完成了她的第三十场马拉松，这对任何人来说都是一个令人赞叹的成就。