New Words：

teenage [ˈtiːneɪdʒ] adj. 十来岁的；青少年的
teenager [ˈtiːneɪdʒər] n. 青少年

Sample Sentences：

Almost one in four teenage girls now smoke.
The teenage years should be the best years of your life!
This is her teenage photo. She is as beautiful as flower!

As a teenager, we shouldn't only study, we should get in touch with the world.
Did your parents allow you to stay out late at night when you were a teenager?

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