Npdes
[医][=National Pollution Discharge Elimination System]全国污染排（放清）除系统
🗣️ 情景例句
Good-bye. And hope to see you soon.
再见。希望很快再见到你们。
Don't fly till you wings are feathered.
羽毛未丰不要飞。
There is a chair below the window.
窗户下面有一把椅子。