young 强调年龄小，处于生长的前期。
youthful 褒义或贬义均可用。指具有青年人的外貌或年轻人应具有的品格。
juvenile 较正式用词，一般12岁以下的少年，着重其生理和智力上的不成熟。
adolescent 指13至16岁左右处于青春期的人，尚不成熟。
参考例句
1. I am a minor adolescent. Have ask consult! 我是个未成年的青少年。有问请教！
2. Children with adolescent parents often fall victim to abuse and neglect. 这些孩子经常成为虐待和忽视行为的牺牲品。
3. The Journal of the American Academy of Child and Adolescent Psychiatry published the study. 《美国儿童与青少年精神病学会杂志》发表了该研究结果。
英英解释
n.
1. a juvenile between the onset of puberty and maturity
2. relating to or peculiar to or suggestive of an adolescent
3. being of the age 13 through 19
4. displaying or suggesting a lack of maturity
5. in the state of development between puberty and maturity
