Sedimenti湖泊沉积物sedimentn.沉淀物sedimentation time沉淀时间,红细胞沉降时间,沉降时间sedimentary mantle沉积覆盖层,沉积盖层sediment and water水杂淀积sediment diffusion泥沙扩散sedimentation state沉积状态sedimentary fly ash沉积粉煤灰sediment characters泥沙特征sedimented red cell沉降红细胞sedimentary complex沉积杂层sedimentary deposit沉积矿床