The secondary dendrites become coarse, and grow competitively during cooling.
二次枝晶在冷却过程中粗化，并竞争生长。
A prig would have said that he had lost culture, and a prude that he had become coarse.
道学先生会说他没有教养，假装正经的人会说他举止粗野。
Through SEM technology, with the increase of zinc, the surface of film will become coarse, porous and with more cracks.
通过SEM，随着锌掺入量的增加，薄膜表面形貌由结构致密、平滑逐渐变得多孔，粗糙，裂纹也随之增加。
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