drainage [ˈdrenɪdʒ]

例句:

• The defect in the drainage must be remedied.
  这排水系统的缺陷该设法补救.
  
• This is a drainage area.
  这里是排水区.
  
• Bad drainage caused the land to be flooded.
  排水不利容易使土地淹水.
  
• Why do streams suffer fish kills from active mine drainage?
  来自SA
• The surface water drainage charge is not new.
  来自THETIMES
• He helps dig drainage ditches in the camp.
  来自VOA