五十岁的已婚人最不可能离婚。

Those who are married and reach 50 are least likely to divorce.

youdao

明天是我妈妈五十岁的生日。

Tomorrow will be my mother's fifty birthday.

youdao

喔，我差点忘了。明天是我妈妈五十岁的生日。

M: Oh, I almost forgot.Tomorrow will be my mother's fifty birthday.

youdao

But people died typically of either infectious diseases or they died during childbirth, or they might have died at old age which would have been 50 or so at that time.

那时的人要么死于传染病,要么在分娩的过程中死去,或者在他们大约五十岁左右的时候,死于衰老

耶鲁公开课 - 生物医学工程探索课程节选