youthful

youthful
/-fl; -fəl/ adj
having qualities typical of youth; young or seeming young 青年人的; 青春的; 有朝气的; 年轻的; 似年轻的
    a youthful managing director 朝气蓬勃的总经理
    a youthful appearance 少相
    She's a very youthful sixty-five. 她已六十五岁却显得很年轻.

牛津英汉双解词典