3D printers are used to build an object with liquid plastic. They build the object layer by layer until it is complete.

3D 打印机用液体塑料来建造物体，他们一层一层地建造着物体，直到完成。

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This makes the object layer an ideal target for Language-Integrated Query (LINQ) support.

这使得对象层成为集成语言查询(LINQ)的一个理想的操作目标。

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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

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