Modern browsers use a same origin policy that only permits subsequent requests to be issued to the same domain where the page originated.

现代浏览器使用一种同源策略，只允许将后续请求发送给发出页面的相同域。

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The first part about Origen, if you brought your readings turn to the part about Origin like around page 56.

第一部分关于奥利金，如果你们带了阅读材料来的话，翻到关于奥利金的那部分，大概在56页附近。

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To have a Web page retrieve content from third-party sources, you must circumvent the Same Origin Policy.

要让 Web 页面从第三方检索内容，必须避开同源策略。

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