irregular grain meaning in English

不规则纹理

There are polycrystalline textures with irregular grain boundaries and linear shear fractures in these two systems
考虑了边界为正方形和圆形两种不同情况，我们发现都出现多晶结构，与系统边界无关。
When the boundary is square , we can find polycrystalline textures with irregular grain boundaries and linear shear fractures . but we also observe the same phenomena when the boundary is circle
考虑了边界为正方形和圆形两种不同情况，我们发现都存在多晶结构，因此，我们推断packing现象中出现的多晶体结构跟系统边界无关。