1. sedimentary association of strata 
   地层沉积组合
2. clay soil formed by sedimentary deposits. 
   由沉积的沉淀物形成的粘土。
3. Sedimentary rock covering older crystalline layers. 
   沉淀岩覆在旧的水晶状层之上的沉积岩石
4. On either side of the phosphor layer is a conducting layer, which provides electrons and creates the electric fields that drive the electrons onto the phosphor. 
   荧光粉层的一边是一导电层，它提供电子形成电场，此电场驱使电子飞向荧光粉。
5. The emission of light from a phosphor after removal of excitation. 
   余辉激振停止后的磷光物质所发出的光

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