用蓝色填充补集区域并将其绘制到屏幕。

Fills the complement area with blue and draws it to the screen.

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用蓝色填充交集区域并将其绘制到屏幕。

Fills the area of intersection with blue and draws it to the screen.

youdao

用蓝色填充交集区域并将其绘制到屏幕。

Fills the area of intersection with blue and draws it to the screen.

youdao