多义线大部分由线段组成的图元能够定义为多义线的就定义为多义线这样在选择时比较方便
Polysemous lines are mostly composed of line segments. If any graphic element can be defined as a polysemous line, it should be defined as such, which makes the selection more convenient
以上为机器翻译结果，长、整句建议使用 人工翻译 。