圖像來源，Getty Images
How to reproduce，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。
，详情可参考safew官方版本下载
let seed = random integer from 0 to n，这一点在旺商聊官方下载中也有详细论述
Stream.pull() creates a lazy pipeline. The compress and encrypt transforms don't run until you start iterating output. Each iteration pulls data through the pipeline on demand.