Zさん："Whoa. It all makes sense. China is the golden ratio country. When you are deep in thought, you are contemplating the golden ratio. Junior High School is the golden ratio ... school."
Aさん：「... oh ... also... it's the angle between the x,y-plane and the z-axis in a spherical coordinate system.」
Zさん："Well, now you're just being absurd."
