root out

基本解释

It is impossible to root out this disease in a few years.
要想在几年内根除这种疾病是不可能的。
Mr Obama’s black supporters hope he will make good on promises to root out racism in the criminal-justice system and the workplace by enforcing existing laws more vigorously.
奥巴马的黑人支持者们希望他能够履行诺言，通过更加有力地执行现行法律来根除刑事司法体系和工作场所中的种族主义。
Lawsuits and crackdowns have displaced file-sharing from public networks into more secretive ones and into things like e-mail, from which it will be virtually impossible to root out.
官司和严打行动已经迫使文件共享从公共网络转向更隐蔽的网站，甚至转向了邮件形式，这么一来根除共享势必难上加难。

FBI agent Weysan Dun said the probe seeks to root out corruption in New Jersey, wherever it is found.
Mr.Brown reiterated in the commons that Mr.Karzai must now root out corruption.
Pakistan is an ally in the U.S.-led war against terrorism and has been under pressure from Washington to intensify efforts to root out extremists blamed for launching attacks on coalition forces across the border in Afghanistan.

When told that their budget must be cut senior bureaucrats do not root out wasteful programs.
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If you root out a person, you find them and force them from the place they are in, usually in order to punish them.
If you root out a problem or an unpleasant situation, you find out who or what is the cause of it and put an end to it.