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。
Fermaw added checks along the lines of:
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
40多歲的另一名陳先生（下稱小陳）形容回購業權「是一個神經病的選擇」。，详情可参考Line官方版本下载
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