（四）违反国家有关规定，将物联网卡用于注册网络账号等非指定用途的;
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.
。关于这个话题，Line官方版本下载提供了深入分析
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