fortieth
adj. 第四十的；四十分之一的
n. 第四十；四十分之一
复数 fortieths
例句
It was the fortieth anniversary of the death of the composer.
那是那个作曲家逝世40周年纪念日。
《柯林斯英汉双解大词典》
I took it on her mother's fortieth birthday.
我在她母亲四十岁生日时拍摄的。
Today is his mother's fortieth birthday.
今天是他母亲的四十岁生日。
