middle-aged造句

The bulk of the book concerns Sandy's two middle-aged children.
书中主要描写桑迪的两个已到中年的孩子。

His sisters are grown up and his parents are middle-aged.
他的姐妹们都已成人，而他的父母亲也人到中年。

The guests were mostly middle-aged men talking business.
顾客多数是些谈正事的中年男子。