这是最基础的构建模块。BoxGeometry 就像捏泥人时的方块，SphereGeometry 则是球体。注意 widthSegments 参数，它决定了球体的精细度——段数越多，球越圆，但计算量也越大。
夕阳西下，金色的余晖洒在村口的年画墙上。，推荐阅读搜狗输入法下载获取更多信息
，更多细节参见safew官方版本下载
At its core, a stream is just a sequence of data that arrives over time. You don't have all of it at once. You process it incrementally as it becomes available.。同城约会是该领域的重要参考
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