Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.
含
岩系、镁质容
岩石
形成的物质基础，区域变质及混合岩化作用、
造活动形成的必要条件。
Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.
含岩系、镁质容岩石形成的物质基础，区域变质及混合岩化作用、造活动形成的必要条件。
声明：以上例
、词
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