They filtered the water through the sand. 他们用沙子滤水。
This filter moves dirt suspended in the water and keeps the water clean. 这个滤水器能去除水中残留的脏东西,保持水的干净。
Many speedway tunnels suffered from water leakage in China.There were no associated methods on how to deal with the problem at present. 摘要我国许多高速公路双联拱隧道面临不同程度的渗漏水灾害的影响,如何解决这一课题,目前尚无统一的认识。
The water pressure can be divided into osmotic pressure and reservoir pressure.By using two models to calculate the osmotic pressure, its propagation velocity could be got clearly. 渗透水压力的计算采用了两个模型,通过这两个模型的计算可以清楚地了解库基中渗透水压力的传播速度。