They must implement the presentation layer.

他们必须实现呈现层。

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It keeps the presentation layer separate from the application layer.

它把表示层和应用程序层分隔开。

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It preserves your CSS layout and keeps your content layer separate from your presentation layer.

它保留你的CSS布局，并保持内容层和表现层分离。

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Or feed readers that create a beautiful presentation layer.

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In addition, mobile developers are able to leverage the cloud for fast, complex processing of their application services before delivering the presentation layer across multiple form factors and devices to ensure great user experience.

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