You must ensure that each layer can scale as user load increases, and that each layer allows for continuous availability with failover, if necessary.

在必要时，您必须确保每一层可以随着用户负载的增加而按一定的比例增长，并且每一层允许在故障转移时继续可用。

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It can even be sent to one of the new generation of so-called 3d printers, which produce scale models in plastic, layer by layer.

它甚至还可以由一种叫做3d打印机的外接设备来一层一层得生成一个塑料模型。

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The “Smart Object” feature was introduced, which allows the user to scale a layer up without significant loss of quality.

“智能对象”也被引入了，使用户可以在放大一个图层时不出现明显的失真。

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Before the experiment in the hanger could begin, researchers calculated the pressures the house would experience in a small-scale study conducted at the University's Boundary Layer Wind Tunnel Laboratory -- which has over 40 years of expertise testing high-rise buildings and bridges.

CNN: Engineering a hurricane-proof roof