after the project is completed,trees must be planted and grass grown on the earth-fetching area,excavated land surface and the exposed land surface for the disposition of waste sand,rock and earth,in order to prevent soil erosion.

• 工程竣工后，取土场、开挖面和废弃的砂、石、土存放地的裸露土地，必须植树种草，防止水土流失。