利用湿地减缓水体流速，并使化学沉淀物和相关污染物沉淀下来。
Use wetlands to slow the water down and allow sediments and associated pollutants to settle out.
尽管另一些人，质疑层叠岩石化石是否是细菌活动的结果，但他们也想知道那些化石是否只是化学沉淀物。
Others, though, question whether fossil stromatolites really are the result of bacterial action, and wonder whether they might be chemical precipitates instead.
本文还比较了胆汁沉淀物与培植牛黄的超微结构及组织化学性质，发现二者基本一致。
Sediment was observed and compared with cultured calculus bovis, both of them had the similar ultrastructure and histochemistry properties.
应用推荐