A:In Great Britain,the Attorney General prosecutes for the Crown in certain cases.

　　在英国，检察总长在某些案件中代表王室进行公诉。

　　B:What about in America?

　　那在美国呢？

　　The lawyer prosecutes for the person in certain cases.

　　律师在某些案件中代表当事人进行公诉。

　　Who will prosecute for the Crown in certain cases?

　　谁会在某些案件中代表王室进行公诉？

　　Why do you prosecute for him in the case?

　　为什么你会在案件中代表他进行公诉？

　　延伸阅读:

　　A:What does the prosecutor need to do?

　　检察官需要做什么？

　　B:The prosecutor must prove the defendant's act was the proximate cause of the injury.

　　检察官必须证明被告的行为是造成伤害的近因。

　　You must prove the fact was true.

　　你必须证明这事实是真的。

　　I want you to prove something.

　　我想你证明一些事情。

　　What do you need me to prove?

　　你需要我证明什么？