They filtered the water through the sand. 他們用沙子濾水。
This filter moves dirt suspended in the water and keeps the water clean. 這個濾水器能去除水中殘留的髒東西，保持水的乾淨。
Many speedway tunnels suffered from water leakage in China.There were no associated methods on how to deal with the problem at present. 摘要我國許多高速公路雙聯拱隧道面臨不同程度的滲漏水災害的影響，如何解決這一課題，目前尚無統一的認識。
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. 滲透水壓力的計算採用了兩個模型，通過這兩個模型的計算可以清楚地了解庫基中滲透水壓力的傳播速度。
