1.We can curb juvenile delinquency by education.

1.我们可以通过教育来控制罪。

2.He is an expert in juvenile delinquency.

2.他是研究罪的专家。

3.The authorities are at their wits' end about juvenile delinquency.

3.当局罪束手无策。

4.The problem of juvenile delinquency presented itself for the attention from the whole society.

4.罪的这个问题引起了全社会的注意。