在 3D 世界里，所有的表演都需要一个舞台。Three.js 遵循“三剑客”原则：场景、相机、渲染器。
Every fragment means promises created for read() calls, promises for backpressure coordination, intermediate buffer allocations, and { value, done } result objects – most of which become garbage almost immediately.
，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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