石墨烯最早在2004年诞生于一个实验室，本质上是一层由纯碳原子组成的蜂窝状晶格层，薄到竟被认为是二维物质。
First produced in a lab back in 2004, graphene is essentially a single layer of pure carbon atoms bonded together in a honeycomb lattice so thin it's actually considered two-dimensional.
石墨烯是由单层碳原子紧密堆积成二维蜂窝状晶格结构的一种碳质新材料，具有一些独特的物理特性。
Graphene is a honeycomb-like sheet of carbon just one atom thick with a number of unique physical properties.
在前人研究的基础上，我们对二维正方晶格和六方晶格光子晶体缺陷的带结构进行了计算。
The band structures of square lattice photonic crystal and hexagonal lattice photonic crystal have been computed in the second chapter.
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