每个轮廓线划定字形的外部或内部区域，它们可以是线段或是Bezier曲线。
Each contour delimits an outer or inner region of the glyph, and can be made of either line segments or bezier arcs.
每个轮廓线划定字形的外部或内部区域，它们可以是线段或是Bezier曲线。
Each contour delimits an outer or inner region of the glyph, and can be made of either line segments or bezier arcs.
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