During the casting, plastic forming, and hot processing, the sizes, orientation distributions, and boundary structures of the crystallites change and produce various microstructures.

金属的铸造、塑性成形、热处理等过程会使晶粒的尺寸大小、取向分布、形状等发生一定的变化，产生不同的微结构。

youdao

Nation says as more and more casting directors and filmmakers choose more natural looking talent, actors and actresses will become more cautious about having plastic surgery if their goal is to survive in the highly competitive business.

VOA: standard.2010.07.22