youth

youth, teenager, adolescent, juvenile

这些名词均有“年轻人，青少年”之意。
youth: 现在几乎专指男青年，尤指10多岁到20多一点的男青年，但作为集合名时间男女青年都可指。
teenager: 主要指13岁到19岁之间的青少年，强调这个年龄段的人的本身特点。
adolescent: 比teenager正式，侧重年龄。
juvenile: 指青少年，系法律上的常用词。

名词 youth:

1. a young person (especially a young man or boy)
   同义词：young person, younker, spring chicken
2. young people collectively
   同义词：young
3. the time of life between childhood and maturity
4. early maturity; the state of being young or immature or inexperienced
5. an early period of development
   同义词：early days
6. the freshness and vitality characteristic of a young person
   同义词：youthfulness, juvenility

1. In his youth he was an extravagant epicurean.
   他年轻时是个花花公子。
2. I can't bear young people casting away their youth.
   我无法忍受年轻人虚掷青春。
3. The fight was started by some youths who had been drinking.
   这场架是一帮喝醉了的小青年惹起的。
4. The youth of the country are being ignored by politicians.
   这个国家的青年没有受到政治家的重视。
5. In his youth, he had shown great promise.
   他在青少年时代就显得很有出息。