英语语法分析

I have reason to use Polygon over Polyline so Polyline is not an option.

我有理由使用多边形在多线多线不是一个选择。

You can make two more segments just to close that polyline in a closed curve.

您可以进行两个部分只关闭在一个封闭的曲线，折线。

In line 109, the polyline element is started, and an initial point is drawn at the origin of the axis.

第 109 行是 polyline 元素的起点，它与坐标轴的原点重合。