The main area was constructed piece by piece, by bolting giant can-shaped modules to each other to form one 74m-long tube.

主区域被一片一片地划开，由一个个罐头形状的模块相互用螺栓连接，组成一条长74米的管道。

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Scientists believe these holes form when the ceiling of a subterranean lava tube collapses, possibly due to a meteorite strike.

科学家认为，地下熔岩洞顶部的坍塌或流星的撞击，都是这些月球坑形成的原因。

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A nozzled tube used to apply paint in a spray form.

一种将颜料喷成雾状的喷嘴管。

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Only when outside and inside channels line up with each other to form a single tube can the ions begin to flow.

ECONOMIST: Medical diagnostics

Vintage Tube logos form the background of a commemorative Oyster card to mark the 150th anniversary of London Underground rail service in London.

BBC: Oyster card celebrates 150th Tube anniversary

Dirks showed that some of the immature-looking cells from his patients could form tumorlike clumps in the test tube, unlike most other cells from the tumors, but he didn't have a method to pluck out the stem cells.

FORBES: Cancer Killer