目前为止，最常用的矢量格式是ESRI Shapefile(见参考资料)，它只存储一种图形；每个文件只包含点或多边形或线条。

The most common vector format by far is the ESRI Shapefile (see Resources), which stores only a single shape type; each file can contain only points or only polygons or only lines.

youdao

不能优化具有绘图类型格式矢量图形向量图形：使用几何公式的图形对象的表示形式，如线条、弧形和正方形。

You cannot optimize pictures that have a drawing type of format vector graphics vector graphics: The representation of graphic objects such as lines, arcs, and squares by using geometrical formulas.

youdao

你把这些线条删除之后，将这一页按格式编排一下。

When you have deleted those lines, format the page.

youdao