如果设计得好，其符号的意义将会使用户连结到现实的一部分。
If well designed, the meaning of their symbology will give the user a link to a part of reality.
不同版本的MF c程序库会自动与您的应用程序连结，视您的组建定义这两个符号的哪一个而定。
Different variants of the MFC libraries are automatically linked with your application, depending on which of these two symbols your build defines.
第二，z轴方向可以用来暗指不需要额外视觉符号导览的连结，例如直线或箭头。
Second, the Z dimension can be used to imply navigational connection without requiring additional visual symbols, such as lines or arrows.
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