5. 三维空间中的线性变换

“Lisa: Well, where’s my dad?
Frink: Well, it should be obvious to even the most dimwitted individual who holds an advanced degree in hyperbolic topology that Homer Simpson has stumbled into…(dramatic pause)… the third dimension.”
“Lisa: 呃，我爸爸到底在哪？
Frink: 对于能拿到双曲拓扑学高等学位的傻瓜来说，这一点也足够明显——Homer Simpson误入了…三维空间！”