preliminary sedimentation

例句：

1. 1. The preliminary sedimentationof the soil is crucial for the growthof plants.
   土壤的初步沉积对植物生长至关重要。
2. 2. During the preliminary sedimentation phase,the particles are moving slowly and colliding with each other.
   在初步沉积阶段，颗粒缓慢移动并相互碰撞。
3. 3. The preliminarysedimentation process helps to sort out thelarger particles from the smaller ones.
   初步沉积过程有助于将较大的颗粒从较小的颗粒中分离出来。