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Create a business object layer, called intermediate objects, which serves as a placeholder for data used in event evaluation.

创建业务对象层，即所谓的中间对象，它们将用作事件评估中使用的数据的占位符。

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This is necessary to isolate the relational layer from the object layer, but this convenience comes at the cost of performance.

这对于将关系层与对象层分离是必需的，但这种便利是以牺牲性能为代价获得的。

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The filament is designed to harden as it dries, so an object can be created layer by layer.

ECONOMIST: A new way to build complicated materials, micron by micron

They said that by using stereolithography, their printer could offer "layer thicknesses and feature sizes that are worlds ahead of what is possible with" the existing technique used by budget printers, which melt plastic and squeeze it through a nozzle to build up each layer of an object.

BBC: Kickstarter sued over 3D Systems' printer patent

Some experts have commented that Angel Ambush was not 'real' augmented reality at all, because the virtual angel was just a layer of video manipulated by a human operator, rather than an independent 3D object.

BBC: Augmented reality goes beyond gimmicks for business