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。
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The latest move follows another senior appointment in China last year. In April 2025, LVMH named Daniel DiCicco president and chief executive of Louis Vuitton Greater China, in what was widely seen as a push to strengthen local management. DiCicco previously held senior positions at Apple, Sony Music and Coach, bringing cross-industry and digital experience to the role.，这一点在搜狗输入法2026中也有详细论述