grain formation

• 结晶

grain formation的用法和样例：

例句

1. Bacteria or bile pigment may serve as a nidus for crystal formation.
   细菌或胆色素可作为结晶形成的一个核心。
2. The purpose of normalizing is usually to define grain structures that have been coarsened in forging.
   正火的目的是使在锻造中变粗的结晶颗粒细化。