discharge of heavy mate-rial through screen plate

例句：

1. 1. The chemical was discharged into the air.
   化学物质被排放到空气中。
2. 2. The firefighters were ordered to discharge water from the hose.
   消防员被命令从水龙带中排放水。
3. 3.The company has been accused of discharging hazardous waste into the river.
   该公司被指控将危险废物排放入河流。