采沙场;沙池2) arresterbed 沙池 例句>> 3) sand excavation 采沙 1. Impact of sand excavation in Pearl River delta on hydrology and environment; 河道采沙对珠江三角洲水情及水环境影响分析 2. Impact of sand excavation and waterway regulation on hydrodynamics of Pearl River networks; 人工采...