face-centered cubic packing

例句：

1. 1.The crystals are arranged in a face-centered cubic lattice.
   这些晶体以面心立方晶格排列。
2. 2.The face-centered cubic structure is the most stable form of ice.
   面心立方结构是最稳定的冰的形式。
3. 3. In the face-centered cubic lattice, each atom has eight neighbors.
   在面心立方晶格中，每个原子都有八个邻居。