提供枚举器以按级别(如计算机策略和用户策略)访问安全策略层次结构。
Provides an enumerator to access the security policy hierarchy by levels, such as computer policy and user policy.
基于这些新特征，在营销战略和营销策略层次提出具体的对策建议以帮助企业更好地制定营销组合。
Based on the new characteristics we propose Suggestions from tactics and strategy to help enterprise to formulate effective marketing mix.
上面的两个层次代表过程是由管理人员选择的，他们为了策略和控制的目的强加了下面的层次。
The upper two layers represent processes selected by managers and imposed upon the lower levels for strategy and control purposes.
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