A complex system could have more than one level of decomposition in the context model level, but in practice there is generally only one.

一个复杂的系统在上下文模型层级中拥有不止一种的分解层级，但是在实践中，通常只有一种。

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Rather it is a layer that extends the browser’s security model down into the operating system level.

它是构建在操作系统级别的一个服务层，以便扩展浏览器的安全模型。

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When planning the security model for your application, you must address both elements to make sure your system has a sufficient level of security.

在为应用程序规划安全性模型时，必须处理好这两个元素以确保系统具有足够的安全性。

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Some of the streamlining will involve removing content for the entry-level model, the magazine reported, including stripping features out of the current navigation system and using less expensive headlamps than the LED lights that now are standard on the car.

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If the Swiss can live with four languages, if they can withstand the diversity of a federal system that delegates many powers to the cantonal level, we dare say it can afford more than one corporate-governance model too.

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