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.
与小德一样，阿斌（化名）今年也是第一次开长途电车，只不过阿斌不是回自己家，而是回女朋友家。
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