An insurance company can tell you the expectation of life of a man forty years of age.

保险公司能够告诉你，四十岁人的寿命期望值。

youdao

He was a man not yet forty years of age, with still much of the salt of youth about him.

他是一个不到四十岁的男人，只是需要提升他的年轻性。

youdao

A big woman, who might be forty years of age, or a hundred, was crouching near the fireplace on her bare heels.

一个胖妇人，可能有四十岁，也可能有一百岁，蹲在壁炉旁边，坐在自己的光脚跟上面。

youdao

In nineteen eighty-three, he began to study more than twenty-two thousand healthy male doctors over forty years of age.

VOA: special.2009.10.20

He died four years later at the age of forty-two.

VOA: special.2010.04.02

Nixon would have reached the Presidency a dozen years sooner, at the age of forty-four.

NEWYORKER: Wag the Dog

Years later, at the age of forty-six she was faced with another very difficult situation.

FORBES: How a Subtle Difference in Attitude Transformed a Small Store into a Global Brand

Michael Nyqvist plays a slightly boring journalist named Blomkvist, who is hired by a rich old man (Sven-Bertil Taube) to probe the disappearance of a teen-age girl, forty years before.

NEWYORKER: The Girl with the Dragon Tattoo