1. Kieselgur is a natural sedimentary deposit composed predominantly of the fossilized remains of diatoms.
硅藻土是一种主要由硅藻化石残骸组成的天然沉积物。
2. Kieselgur is commonly used as a filtering agent in various industries such as brewing and water treatment.
硅藻土常被用作各行业（如酿造和水处理）的过滤剂。