line orientation 与直线定向 ; 方向 ; 线条朝向 ; 线条定位
orientation of mesh line [数] 网格线定向
orientation of line 有向线段
Orientation mark line 定向标志线
Line Orientation Simulation 线上操作模拟
The angle of the orientation line determines which corners the starting and ending lines pass through.
方向线的角度决定起始和结束线通过的角。
Then ending line is perpendicular to the orientation line and passes through one of the corners of the rectangle.
还有结束线也垂直于方向线，并且通过矩形的其中一个角。
The starting line is perpendicular to the orientation line and passes through one of the corners of the rectangle.
起始线与方向线垂直，并经过矩形的一个角。
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