Fine silt, deposited in ancient rivers and lakes.

即远古时期河湖中沉积的细泥。

Reservoir water was released gradually but the finer silt clouded the river and caused some loss of fish in the first years.

水库水逐渐释放，但更细的泥沙使河流蒙上了一层阴影，并在最初几年造成了一些鱼类的损失。

In this site, which consists mostly of lake bed deposits of fine grained silts, you have volcanic ash mixing in with the silt.

在这个主要由细粒淤泥的湖床沉积物组成的地点，火山灰与淤泥混合在一起。

Aside from the heartrending work of recovering the dead, the boat had sunk upside down into soft mud, stirring up fine silt and creating extremely poor visibility.

除了打捞死者这一令人心碎的工作外，船还倒沉在软泥里，搅动着细小的淤泥， 能见度极差。