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An creates a completely separate browsing context with its own window object, its own document, and most importantly;its own prototype chain. A function hooked on HTMLMediaElement.prototype in the parent window is not the same object as HTMLMediaElement.prototype in the iframe’s window. They’re entirely separate objects. If fermaw’s audio element lived inside an iframe, my prototype hook in the parent window would never fire.
，这一点在51吃瓜中也有详细论述
不到48小时，中东的地缘政治格局就被搅了个七零八落。
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在邹露璐看来，代孕引发的一系列民事法律难题之外，当下更亟待解决的，还是代孕子女的落户这一基础民生问题。“相较于抚养权归属的争议，孩子的身份确认、户口登记，是保障其生存权、发展权的首要前提。”她说。