This paper describes the phenomena of welding deformation of low carbon sheet steel, analyze the causes and put forward the measures of prevention through discussing some instances in detail.

本文以具体实例，详细地论述了低碳钢薄板件焊接变形的现象，原因及防护借施。

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Graphene is a flat sheet of carbon just one atom thick—with the carbon atoms arranged in a honeycomb lattice.

石墨烯是一种只有单原子厚度的碳原子平面层——碳原子按蜂窝状晶格排列。

youdao

Graphene is a super strong sheet of carbon that's only one-atom thick.

石墨烯是一种超强度的单层碳——只有一层原子那么厚。

youdao

Imagine a sheet of carbon atoms laid out on a hexagonal grid, like chicken-wire.

ECONOMIST: Space-age soot

They estimate that there could be hundreds of billions of tonnes of carbon stored in methane reservoirs under the ice sheet.

BBC: Antarctic may host methane stores