A better streams API is possible
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，更多细节参见旺商聊官方下载
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im钱包官方下载中也有详细论述
automate repetitive tasks