translation.en: You set a couple of boundary conditions, like gravity, the surface tension, density, etc., and then you press "execute," and magically, the universe produces you a perfect ball lens.
translation.zh: 你给它设定一些条件，比如重力 表面张力、密度等等，而后按“执行” 于是宛如魔术一般，宇宙就给你制造出了一个完美的球状镜片