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1·Connect the first point of a curve or polyline with the last one.

连接曲线或多段线的第一点与最后一点。

2·For example, polyline requires four arguments: t has to be a Turtle;

例如，polyline这个多段线函数，需要四个实际参数：t必须是一个Turtle小乌龟；

3·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。

4·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。

5·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。

6·Presents an algorithm for polyline clipping based on a multiply connected domain formed by finite loops.

提出了一种有限环域裁剪多义线的算法。

7·This code will draw a feedback polyline and in the sixth map mouse up a polygon will be created and drawn as shown.

这些代码将会绘制一个反馈的线，当鼠标第六次谈起的的时候，将会创建一个多边形，绘制效果如下所示。

8·Furthermore, an example of polyline clipping based on a multiply connected domain formed by finite loops is presented.

文章还给出了一个由内、外环组成的有限环域裁剪一条多义线的实例。

9·Once you have worked through all the values in the array, the polyline is closed off and a style is applied to the line.

处理完数组中的值后封闭折线并应用适当的样式。

10·While creating a point shapefile, when you are prompted to add a polyline shape, add each vertex as an individual point.

在创建一个点shapefile时，若系统提示添加一个多线形状，那么就以单个点添加每个顶点。