ord.第四十
n.第四十四十分之一，第四十个
adj.第四十的；第四十个的；四十分之一的

原形：fortieth复数：fortieths

The fortieth anniversary of their marriage was celebrated with a grand party.
他们的四十年结婚纪念日被盛大地庆祝。
She finally reached her fortieth birthday, and felt a mix of excitement and nostalgia.
她终于迎来了四十岁生日，心中充满了兴奋和怀旧之情。
The fortieth state to join the United States was Ohio in 1803.
在1803年，美国的第40个州是俄亥俄州。
After forty years of teaching, she retired from her position at the school.
经过四十年的教学，她从学校退休了。
The marathon runners completed their fortieth lap around the track.
马拉松选手们完成了他们绕跑道的第四十个圈。
The book is part of a series, with each volume marking a fortieth installment.
这本书是一个系列的一部分，每卷都是第40本。
In the movie, the main character turns fortieth and decides to make a major life change.
在电影中，主角满四十岁时，决定做出人生的重大改变。
The company's fortieth year in business was marked by steady growth.
该公司成立四十周年之际，业务稳步增长。
The museum's fortieth exhibition showcased a collection of rare artifacts.
博物馆的第四十个展览展出了罕见的艺术品。
On his fortieth try, he finally managed to solve the complex puzzle.
经过四十次尝试，他终于解开了那个复杂的谜题。