草酸钙在凝胶中的周期沉淀和化学不稳定性&尿结石鲕状结构探讨
Chemical Instability and Periodic Precipitation of Calcium Oxalate in Gelatin Gel
矽质岩包括燧石和沈积石英岩，呈薄层状产出，沈积石英岩具鲕状、砾状结构。
The thin-beded siliceous-rocks include chert and depositional quartz with textures of oolite and pebble .
鲕状结构