Some of them are extremely long and detailed taking days to complete and covering all aspects: ai, Math, Physics, and Programming.

它们中有些极其冗长而且充满细节需要花好多天才能完成，而且包括了所有的方面：AI，数学，物理学和编程。

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Step 5: When design creation is complete then change the line color of the design to white and save the file in "AI" format.

第五步：当图案制作完成后，改变轮廓的颜色为白色并保存成”ai“格式。

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Step 5: When design creation is complete then change the line color of the design to white and save the file in "AI" format.

第五步：当图案制作完成后，改变轮廓的颜色为白色并保存成”ai“格式。

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