这些对象的结构性能进行了研究的群,环,域和其他抽象的系统,其本身这样的对象的研究。
The structural properties of these objects are investigated in the study of groups, rings, fields and other abstract systems, which are themselves such objects.
自从一个体系架构只把焦点集中在这些元素上以来,它就提供了一个抽象的系统,因而提供了一个复杂的管理方法。
Since an architecture focuses on only those elements that are significant, it provides an abstraction of the system and therefore provides a means of managing complexity.
因此SGML定义了一种更抽象的文件系统视图,称为实体。
So SGML defined a more abstract view of the file system, called entities.
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