fractional precipitation

• 分段沉淀,分沉淀,分级沉淀,分步沉淀

fractional precipitation的用法和样例：

例句

1. Magnesium titanate was obtained with special liquid phase precipitation method.
   采用特殊液相沉淀法制备了镁的钛酸盐。
2. Precipitation by oxalate is the primary method to produce rare earth oxides.
   稀土草酸盐沉淀法是制备稀土氧化物的主要方法。