In order to prevent and control illegal and harmful information to spread on Internet, it has become significant problem in network security field to filter the information spreading on Internet.
为了防止和控制非法，有害信息进行传播，对网络上传播的信息进行内容过滤已成为目前网络安全研究的重点问题。
In order to prevent and control illegal and harmful information to spread on Internet, it has become significant problem in network security field to filter the information spreading on Internet.
为了防止和控制非法，有害信息进行传播，对网络上传播的信息进行内容过滤已成为目前网络安全研究的重点问题。
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