"command": "cmdValidatePromo",
功能特性：支持多源异构与复杂网络环境
，这一点在heLLoword翻译官方下载中也有详细论述
writable: false means no code can reassign window.Audio to a different value. configurable: false means no code can even call Object.defineProperty again to change those settings. If fermaw’s initialisation code tried to restore the original Audio constructor (a perfectly sensible defensive move) the browser would either fail or throw a TypeError. The hook was permanent for the lifetime of the page.，这一点在safew官方版本下载中也有详细论述
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