They stacked rocks with center holes (tube or doughnut shaped) from the surface to the deep stone layer as a guide for their drills (similar to today's guide tubes).

管状或中空管状的中心孔从地表到深石岩石层放满石头，以作为铁转的探头，作用类似今天的导管。

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The cells produce a protein structure shaped like the plastic tube, which dissolves.

这些细胞产生出和塑料管同样形状的蛋白结构，而塑料管则分解了。

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The traditional MRI unit is a large cylinder-shaped tube surrounded by a circular magnet.

传统的核磁共振装置是由一圆形磁铁包围的大型圆管。

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The wraparound labels on conventional round bottles were difficult to read, so she designed a flat tube-shaped container that stood upright on its cap, with plenty of room for a large, flat label that could be read easily at a glance.

WSJ: When Simplicity Is the Solution

Macchiarini performed the nine-hour operation on April 9 at the Children's Hospital of Illinois after carefully creating the windpipe using stem cells from Hannah's bone marrow that were saturated over a matrix of plastic fibers shaped into a tube.

CNN: Toddler gets new windpipe from her own stem cells

Each piece then gets hand trimmed or pinched into shape, he says, showing how a thin tube of clay will be shaped into candelabra that looks like a long, thin piece of coral.

WSJ: Lily Pads and Bamboo Stalks, Made of Clay