free settling

例句：

1. 1. The river is experiencing a period of free settling as the floodwater recedes.
   随着洪水退去，河流正在经历一段自由沉降的时期。
2. 2. Free settling is an important process in the formation of sedimentary rocks.
   自由沉降是沉积岩形成过程中的一个重要过程。
3. 3. During the free settling phase, the water level will gradually drop and the sediment will settle to the bottom.
   在自由沉降阶段，水位将逐渐下降，沉积物会沉到底部。