In order to avoid any impact on interior lighting, paper-cuts are largely overt cuts to get more hollow-cut areas.
为了不影响室内采光，窗花多为阳剪，以求得较多镂空的面积。
2
To figure out how much yarn you need to cut for the first layer, just hold it on top of the circle, spread it out like a fan and see if there are any hollow areas.
算好第一层所需的毛线，将其固定在圆上，散开成扇形，并查看是否存在空白区域。
3
In three overlapping circles, three round shapes overlap after the joint and overlap are preserved, only two circles overlap area have been cut off hollow out (figure 3).