One way of introducing a bandgap into graphene is to make extremely narrow ribbons of the material.

给石墨烯引入带隙的方法之一是制作极窄的石墨烯带。

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As it was extremely narrow, the man was unable to move, but the fire fighters were eventually able to free him by cutting a huge hole in the wall.

由于烟囱太窄，那人无法动弹。消防队员在墙上挖了个大洞，才终于把他解救出来。

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The boy has a rare and potentially fatal condition called Long Segment Congenital Tracheal Stenosis, in which patients are born with an extremely narrow airway.

这个男孩患有一种罕见的称为“先天性长段气管狭窄”的有潜在致命性的疾病，这让他从出生就有较常人非常狭窄的气道。

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Jim McGreevey - were extremely narrow, and they doubt her early advantage will hold up.

CNN: By Stuart Rothenberg

To do this, they need materials that absorb microwaves in an extremely narrow range.

ECONOMIST: MONITOR

And so everyone did, and a lot of states--extremely, extremely narrow versions of what insanity is after that.

NPR: Slate's Jurisprudence: Moussaoui's Insanity Defense