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.
等到他们需要使用键盘鼠标来提升效率，这些围绕他们打造的工具，自然也需要贴合他们的习惯做出改变。
。heLLoword翻译官方下载是该领域的重要参考
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