题目内容
The flexibility of polylines lies in the fact that they are composed of not only lines but also arc segments, and the lines can have width.
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Polylines take up more disk space than the equivalent lines and can’t be used to draw ordinary lines.
If you have a particular requirement to perform certain tasks, you still need to use polyline.
Polyline and ordinary line have their advantages and disadvantages each, and you can choose to use them in accordance with your requirements.
零件的技术要求有（ ）。
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