1·Therefore, each point should be prefixed with the control character L. The third control character Z closes a path, which is needed for (multi-)polygons.
因此，每个点之前应该加上控制字符 L 作为前缀。 第三个控制字符 Z 关闭一条路径，这对于（多）多边形是必需的。
2·Notice how you can create squares, polygons, and circles with names of your choice in the URL field.
注意如何在UR l字段中用您选择的名称创建正方形、多边形和圆形。
3·At the middle level, a portable graphics engine provides support for line draws, area fills, polygons, clipping, and color models.
在中间层，可移植的图形引擎提供对线的绘制、区域的填充、多边形、裁剪以及颜色模型的支持。
4·Similarly, state and county boundaries can be represented with polygons.
类似地，州和国家边界可以用多边形表示。
5·After reading in the Step 1 pie chart, polygons specified by the triangle vertices file are drawn on the Step 1 chart.
在读入步骤1的饼图后，将在步骤1的图表中绘制由三角形顶点文件指定的多边形。