The data elements that constitute an object. Data members ordinarily should be private.
组成对象的数据元素。数据成员一般应设为私有的。
If the data is private to the object, the method has full access to it. You should not have to pass it in.
如果是私人的数据对象，该方法有完全访问。你不应该通过它。
According to the requirement of user's multidimensional data analysis, we design an private object-oriented multidimensional metadata model.
根据用户的多维数据分析需求，设计出面向对象的私有多维元模型。
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