For this example, only the first coordinate pair from the dots file is used to build the various drawing commands.
对于本示例，只有dots文件中的第一组坐标对将用于构建各种绘制命令。
A metafile, also called a vector image, is an image that is stored as a sequence of drawing commands and Settings.
图元文件，也称为矢量图像，是一种存储为一系列绘图命令和设置的图像。
File. Defining the color white on line 10 is important to ensure that the various drawing commands complete as expected.
在第10行中定义白色对于确保各个绘制命令按预期完成是十分重要的。
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