在全国范围内，北京石花洞洞层最多，钟乳石叠置关系明显，石笋中具有微层理，月奶石发育最好。
Across China, Shihua cave is well known for its characteristic multi levels, superimposed stalactite, micro banding and best developed moonmilk.
本课题根据微多相层理论，采用界面沉淀法获取超细氧化铜粉体。
Preparation of ultra-fine ZnO powders by interfacial stripping precipitation method;
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