Negative space also serves to structure a group of elements and create balance.
负空间也可以帮助组织一组元素，然后创造平衡。
Deriving the smallest primitive unit cells, necessary to describe the translational periodicity of a crystal structure, is the first step toward choosing the correct space group.
导出反映晶体结构周期的最小素单胞是正确判断空间群的第一步，其中以还原单胞的选择最为理想。
An experimental study was carried out on shear bearing capacity of post-installed anchor group in concrete structure with different anchor edge distance and anchor space length.
目的研究锚栓边距和间距的变化对混凝土结构后锚固群锚抗剪性能的影响。
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