/ˈdʒu:vənaɪl ||; ˈdʒuvənaɪl/adj1 (formal 正式) of, for or involving young people who are not yet adults 少年的；未成年的: juvenile crime 青少年犯罪
2 behaving like sb of a younger age; childish 孩子气的；幼稚的:
He's twenty but he is still quite juvenile. 他都二十岁了，但行为还相当幼稚。
juvenile noun [C]