举止与年龄相称jǔ zhǐ yǔ nián líng xiàng chēng
act one's age
原声例句
潘潘
The ringmaster was of ripe age.
马戏团领班成年而有经验。
经济学人-国际
Time was when people in poor countries were too hungry and hardworking to be obese, could not afford cigarettes and mostly died before the ailments of ripe middle age kicked in.