adolescents青少年adolescentadj.青春期的；青少年的n.青少年adolescent mammary hypertrophy青春期乳房肥大症adolescent adjustment reaction青少年适应反应adolescents whoserelatives died丧亲青少年adolescents' health care clinic活性硫化镍Adolescent idiopathic seoliosis青少年特发性脊柱侧凸Adolescent cervical spondylosis青少年颈椎病adolescent idiopathic scoliosis青少年特发性脊柱侧凸adolescents' and youths' students激活的凝血激酶adolescent medical service centre青少年医疗服务中心adolescent subjective personality青少年主体性人格

1. Juvenile crime is a serious problem in some countries.
   在有些国家里，青少年犯罪是个很严重的问题。
2. Youth boredom is the main culprit behind youth crime.
   年轻人的无聊是青少年犯罪的最大原因。