He went bankrupt in his forties.

他在四十多岁的时候破产了。

My mother gave birth to me in her forties.

妈妈四十多岁才生了我。

Grandparents got married in the forties.

爷爷奶奶是40年代结婚的。

He was very successful in his middle forties.

他在四十五六岁时很成功。

Her brothers were both hefty men in their forties.

她的两个兄弟都是四十多岁，身高体壮。

Steel cans were introduced sometime during the forties.

钢罐是在四十年代的某个时候开始使用的。

He didn't get married until he was well into his forties.

他到四十好几才结婚。

She became quite a notable director in the thirties and forties.

她在20世纪的三四十年代成为一位名导演。