![Marvin](https://i2.chuimg.com/7c24f630811b11e5b11a0139c33c49f6.jpg?imageView2/1/w/160/h/160/interlace/1/q/75)
Marvin
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画饼充饥的WSWLN
欢迎讨论虚拟厨艺
http://leima.is
http://www.douban.com/people/emptymalei
ContourPlot3D[(x^2 + 20/4*y^2 + z^2 - 1)^3 - x^2*z^3 - 9/50*y^2*z^3 == 0, {x, -1.5, 1.5}, {y, -1, 1}, {z, -1.5, 1.5}, Mesh -> None, BoxStyle -> Directive[White, Opacity[0.0]]]