The adolescent period is one's best time.

青少年期是一个人最美好的一段光。

She was transformed from a lanky adolescent into a willowy young woman.

她从一个瘦削的少女变成一位苗条的少妇。

The adolescent life is most important.

青春期的生活是非常重要的。

The audience were mostly adolescents.

听众几乎都是年轻人。