watercourses

例句:

• On a map, these entangling watercourses had come to look like the letter "H." The Mississippi was the right-hand side.
  来自NEWYORKER
• The Superintendent of Public Works gives orders for all watercourses to be inspected.
  公共建设部部长下令检查所有河道。
  
• There are plains of hard sands and plateaus with dried - up watercourses, the there are mountain ranges.
  这里有平坦的戈壁滩,有水道干涸了的高原, 还有连绵不断的山岭.
  
• Regulate rivers and watercourses this ancient problem is becoming more complex and stem.
  治水这一古老的问题正在变得更为复杂严峻.
  
• Various watercourses, only temporarily subdued, thread throughout the metro area.
  来自NEWYORKER
• Sepa said de-icer has the potential to be very polluting if high concentrations get into a watercourses.
  来自BBC