The popular Presentation Model (see Resources) advocates separating out the state and business logic of an application into a model layer that is separate from the GUI controls in the view.

流行的 Presentation Model （请参阅 参考资料） 提倡将应用程序的状态与业务逻辑分开放入模型层中，而模型层是从视图的 GUI 控件中分离出来的。

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Although this layer is usually out of scope for discussions around a SOA, it is gradually becoming more relevant.

尽管这一层经常超出了围绕SOA讨论的范围，但是它却变得越来越有意义。

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The amount of water in the ocean would have formed the equivalent of a 1, 800 foot layer spread out over the entire planet.

如果将海洋所含总水量在火星表面铺展开，相当于给其表面铺了一层厚达1800英尺的水层。

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The lipids will form a bi-layer where the water soluble part of the lipid points out of this layer and the oily part points in.

脂质会形成双层膜,水溶性部分朝向膜层外,而脂溶性的部分朝向双层膜内部

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Both models also sport dual-layer backlit keyboards, with a snazzy red tone peeking out from under the black chiclet-style keys.

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This is complemented by a second layer of read protection offered by the robust data hold-out algorithm in Plextor's exclusive firmware, thus allowing the drive to achieve total data accuracy even in the long-term.

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It draws out the solvents from the bottom-most layer of polish, leaving all the layers dry and hard, while conditioning cuticles with almond and jojoba oil.

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