drainage of stagnant water

• 排涝

drainage of stagnant water的用法和样例：

例句

1. That is to say, the whole draining and water drawing function is brought into play secretly without the witness of us.
   也就是说，整个排涝引水功能是在我们肉眼看不见的情况下，悄然地发挥着功效的。
2. The calculation method of drainage modulus in agricultural diked area is inapplicable in urban diked area.
   摘要农业圩区原有的排涝模数计算方法已不适用于城镇圩区。