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。

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It is then pressed in a heat press for two minutes into a flat sheet.

然后在热压机中压制两分钟，形成平板。

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All paper is essentially dried up plant fibers, clinging together in a flat sheet.

所有的纸在本质上只是干燥的植物纤维，通过平板粘结在一起。

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This tube, this hollow tube, which food passes through is made up of many, many epithelial cells which directly abut one another and would be a flat sheet except that it's rolled up into a tube.

这个管道,这个中空的管道,食物可以穿行其中,而它就是由许多许多上皮细胞构成的,上皮细胞一个连着一个,形成了一个平坦的细胞层,但实际上它们还在肠管中卷成管状

耶鲁公开课 - 生物医学工程探索课程节选

ADA2h has two helix-shaped structures called alpha helices that are packed against a flat, sheet-like structure.

ECONOMIST: Folding stuff

Engineers from University of Michigan found they could be used to obscure objects so that they appeared to be nothing more than a flat black sheet.

BBC: Carbon nanotubes experiment results

By using the latest in rear-projection technology, a high resolution, colour 3D-like holographic image is projected onto a flat two-dimensional sheet of acrylic in the shape of a woman.

BBC: Airport avatars offer travel advice