Deak is an expert in juvenile delinquency.

　　迪克是研究青少年犯罪的專家。

　　He is an expert in juvenile delinquency.

　　他是研究青少年犯罪的專家。

　　He had no history of delinquency.

　　他沒有違法記錄。

　　Not all delinquencies lead to foreclosure.

　　并不是所有未按時還債的情形都會導致喪失抵押品的贖回權(quán)。

　　Their aim is to reduce people's dependency on the welfare state.

　　他們旨在減少人們對福利制度的依賴。