The water was always laden with pebbles, gravel, and sand, known as glacial outwash, that was deposited as the flow slowed down.
水里总是遍布鹅卵石、砾石和沙子——它们被称为冰水沉积，是在水流减缓时沉积下来的。
The result showed that as compared with quartz-sand filter media, the modified quartz-sand is more efficient in treatment of algae-laden water;
采用改性石英砂滤料强化过滤处理含藻水的试验结果表明，与石英砂滤料相比，改性石英砂滤料对含藻水具有优良的处理效果；
The result showed that as compared with quartz-sand filter media, the modified quartz-sand is more efficient in treatment of algae-laden water;
采用改性石英砂滤料强化过滤处理含藻水的试验结果表明，与石英砂滤料相比，改性石英砂滤料对含藻水具有优良的处理效果；
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