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.
等大球最紧密堆积使其在地球各层圈中晶体结构保持恒定。
It maintains the same crystal structure in all layers of the earth.
根据颗粒紧密堆积理论，探讨胶凝材料的颗粒级配对水泥凝胶体微观结构及强度的影响。
By using particle dense packing theory, the influence of particle size distribution of cementitious material on microstructure and strength of cement gel were discussed in this paper.
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