having the qualities that are typical of young people年轻人特有的;富有青春活力的;朝气蓬勃的
At the time I admired his youthful enthusiasm.当时我很羡慕他那年轻人特有的热情。
She has very youthful skin.她的皮肤非常细嫩。
young年轻的
A youthful president can be good for a country's morale.一位年轻的总统可以有助于改善国家的精神面貌。