我很高兴你向比利提出了不良行为警告。他还是个孩子，还是需要有人指导。

I'm glad you read the riot act to Billy. He's still a kid and still needs to be told what to do.

《柯林斯英汉双解大词典》

他们的行为应该是对其他年轻人的一个警告，而不是被效仿。

Their actions should be a warning to other young people instead of being followed.

youdao

他警告，当日本的团体行为变化了，这种情况就会改变很快。

And when Japanese group behaviour changes, he warns, it will change fast.

youdao