她虽然是中年人了，但是看起来很年轻。

Tā suīrán shì zhōngniánrén le, dànshì kànqǐlái hěn niánqīng.

Although she is already middle-aged, she looks very young.

很多中年人开始注意身体健康。

Hěn duō zhōngniánrén kāishǐ zhùyì shēntǐ jiànkāng.

Many middle-aged people start to pay attention to their health.

他是一个中年男人，在银行工作。

Tā shì yí gè zhōngnián nánrén, zài yínháng gōngzuò.

He is a middle-aged man who works in a bank.