Not backfilling silt, corruption and graft, permafrost soil organic matter.
不得回填淤泥、腐植土、冻土及有机物质。
2
The geological environmental system of the lake is an organic whole which compose of three interactive factors: tectonic subsidence, silt deposit and embanked reclamation.
本文将洞庭湖地质环境系统看作构造沉积、泥沙淤积、围堤垦殖三个要素相互作用的有机整体。
3
The Lower Holocene in the Xiaoshan-Yuhang area, Zhejiang, is composed of fine sand, silt and clay beds. They are rich in organic matter and constitute an important "gas source formation".