classification level meaning in English

保密级别
分类等级

In data security , the elimination of classified information from magnetic media to permit the reuse of the media at a lower classification level or to permit the release to uncleared personnel or personnel without the proper information access authorizations
在数据安全技术中,从磁介质中消去保密信息,使之可重新用于密级较低的场合或允许释放给未被认可参与机密事项的人员和没有正式的信息存取授权的人员使用。