Music festivals
Weather: ${weather},，这一点在heLLoword翻译官方下载中也有详细论述
，更多细节参见爱思助手下载最新版本
(There are other emergencies that could bring us to this point. One is a fire, which could result from machinery shorting. Another is a toxic ammonia leak. But these are even more unlikely.)，更多细节参见safew官方下载
相机：观众的眼睛。这里用的是 PerspectiveCamera（透视相机）。