If the party has demurrer to the qualification of the expert witness, like the professional knowledge, education background, he can inquire the expert witness in court.

当事人对出庭的专业人员是否具备相应专业知识、学历、资历等专业资格等有异议的，可以进行询问。

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You seemed to have more than the everage share of intelligence for a man of your background, " sneered the lawyer at a witness on the stand."

一位律师嘲笑站在一旁的目击者说：你看起来比你同一背景的人聪明。

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He assisted in witness-background profiling in 2008 for the U.S. Justice Dept in a terrorism financing trial.

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Errol Robinson told the BBC his clients' convictions had relied heavily on a key anonymous witness with "a very questionable background".

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