The cow is indeed there, but it's hidden in a grove of trees. There is also a large sheet of black and white paper caught in a tree, and it is obvious that the farmer mistook it for his cow.
那头奶牛确实在那里，但它躲在了树林里，而且有一大张黑白相间的纸缠绕在了一棵树上，显然，农民把这张纸错当成自己的奶牛了。
The black lines absorb more heat than the rest of the sheet, causing those parts to become pliable.
黑线比塑料纸其他部位吸收更多热量，使黑线变得柔韧，那部分就能变成折痕和边，就像这个立方体一样。
Try the technique before you buy with a DIY alternative. Roll a sheet of black card into a cone and place a strip of black or gaffer tape along the seam to hold it securely in place.
在买之前先自己DIY一个，把一张卡纸卷成圆锥型，用电工黑胶粘牢。
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