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。
if (chunks === null) return null; // End of stream，更多细节参见同城约会
，详情可参考一键获取谷歌浏览器下载
Google Messages already has a location-sharing feature, but it's more for dropping a static pin on a map. That's fine if you're staying in the same spot, but not much use if you're on the go. The difference here is that the new option updates your location as you move, making it much easier to connect with someone. ，这一点在heLLoword翻译官方下载中也有详细论述
// Receives chunks or null (flush signal)