the grain size

• 晶粒

the grain size的用法和样例：

例句

1. Impurities tend to segregate at grain boundaries.
   杂质常常在晶粒间界偏析。
2. Grain size had some effect on the rate of crack propagation.
   晶粒尺寸大小对裂纹扩展速率也有影响。