There's a whole confiscated armory here.

这里没收的东西都有一个军械库了
I never understood the kids who'd bring this stuff to school.

我一直不懂那些孩子把这玩意儿带学校来干嘛
I mean, showing off your pair of nunchucks

就为了炫耀双节棍
- is worth expulsion? - Yeah, right?

-被学校开除值得吗 -是啊
Well, that's addled essence of adolescence.

青春期就是这么鲁莽啊
Brain's prefrontal cortex doesn't fully develop until your 20s.

人脑的前额皮质要到二十多岁才会发育完全
Means your teen years are spent

意味着人在青少年时期
oblivious to consequences and prone to reckless behavior.

更为鲁莽冲动不计后果
Our killer's about 15 years too late for that excuse.

凶手要想用这个当借口恐怕晚了十五年
Well, you think a decade and a half

你以为15年就能
would let everyone grow into mature and caring adults.

让所有人都变得成熟友善吗
Not always the case.

我看未必