To reproduce the landscape in 3-D, a twin-engine plane flew over the city and fired laser beams through the dense tree canopy. The beams bounced off the ground, buildings, and other structures below.

为了在3 - D模型中重现，一架双引擎飞机飞越城市和浓密的树冠，发射并采集从地面，建筑物和其他结构反射回来的激光束。

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The means for doing so were found in a special moldable agarose gel, dubbed 3-D Petri dishes, that encourage cells to grow into certain shapes and structures.

他们发现专用的可塑琼脂糖胶（被称为3-D培养皿）就能刺激细胞，使之发育成特定的形状和结构。

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Under these conditions, the cells will aggregate to form 3-d tissue-like structures.

在这个情况下，细胞能够聚集在一起形成一个三维结构。

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The consortium tested the practicalities of using a printer on the Moon by setting up a D-shape 3D printer, which are used to print very large house-sized structures, in a vacuum chamber with simulated lunar material.

BBC: 3D printed moon building designs revealed

Existing 3-D printers, also called rapid prototyping machines, build structures layer by layer.

FORBES: MIT Architect Plans to Print Her Own Buildings