此外，我们还使用红色的虚线圆来突出显示导致错误的建模元素，并用橙色的虚线圆突出显示不推荐使用的建模元素。
In addition, we use red dotted circles to highlight a usage of modeling elements that is causing the error, and orange dotted circles to highlight a usage of modeling elements that is not recommended.
在图形的绘制模块中又可以分成七个小的模块：直线、虚线、圆和圆弧、椭圆及椭圆弧、样条曲线。
Drawing module is divided into seven small modules: dash, line, rectangle, circle, arc, ellipse and bezier.
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