单词：mineral grain
mineral grain的用法和样例：
例句
- Grain size refinement by dynamic recovery and recrystallization is thought to be responsible for the formation of foliated fault locks.由动态恢复和动态重结晶控制的矿物颗粒的细粒化被认为是产生这些片理化断层岩的原因。
- Sulfuration occurs on the surface of most mineral particles, especially in summer, suggesting a relatively extensive atmospheric reaction over Beijing in summer.研究还发现，硫化现象可以发生在不同矿物颗粒表面，且这种现象主要发生在夏季，反映夏季大气化学反应较为活跃。
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