逻辑坐标(Logical Coordinate)是系统用作记录的坐标，也就是设备场景内的坐标，默认为MM_TEXT模式，以像素为逻辑单位，X轴向右为正，Y轴向下为正
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logical coordinate system 逻辑坐标系统 ; 逻辑座标系统
By introducing the concept of coordinate correlation, those random and scattered coordinate points were correlated as an organic whole via physical and logical relations.
引入坐标关联的概念，将那些无序、零散的坐标点用物理、逻辑关系关联起来，使之成为有机的整体。
The coordinate system must therefore be mapped from logical Cartesian coordinates to physical screen coordinates.
因此，坐标系统需要从逻辑坐标系转换到物理坐标系上去。
The screen now contains two coordinate systems: physical and logical.
屏幕现在包含两个坐标系：物理和逻辑。
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