ParametricGeometry 允许你用数学公式来定义形状。这里的 klein 函数生成了一个著名的数学模型——克莱因瓶。它是一个没有“内”和“外”之分的奇怪瓶子。对于初学者，你只需要知道：只要你能写出 x, y, z 的方程，Three.js 就能帮你画出模型。
△ 등교 거부가 반복되어 정상적인 학교생활에 실질적인 지장이 생길 때
⚡ Performance: Fast, responsive, non-intrusive。业内人士推荐新收录的资料作为进阶阅读
국힘 지지율 21%, 張 취임후 최저… 지선 여야 지지差 16%P 최대。业内人士推荐新收录的资料作为进阶阅读
And it’s worth mentioning here that modularity does not mean making big, thick, heavy laptops. Lenovo’s new ThinkPad is more modular than the previous model, and still weighs 100 grams less.
Psychology and biology offer one way of thinking about "The One", but mathematics puts forward another.，更多细节参见新收录的资料