teens:

n. 十多岁，十几岁；青少年

Those teens are so obnoxious with their loud music.

那些青年放的音乐太吵了，真讨厌。

She began writing poetry in her teens.

她从十几岁开始写诗。

Are mothers and teens inevitably at loggerheads?

母亲与青少年不可避免地会发生争执吗？

I have never lost the weight I put on in my teens.

我在十几岁时增加的体重从没减下去过。