灌溉

• Dams and waterworks have been provided to improve irrigation .
  修建水坝和水利工程以改善灌溉条件。
• An irrigation system is selected that is less prone to plugging .
  选择这样一个灌溉系统很少会阻塞。
• Rivers and lakes provide us with water transport and irrigation .
  江河湖泽给我们以舟楫和灌溉之利。
• A variation of subirrigation has received increasing attention .
  一种改进了的地下灌溉已经引起了广泛的注意。
• Only when a reservoir is built here ， can we solve our irrigation problem .
  除非在这里修个水库，才能解决灌溉问题。
• Irrigation timing is important due to light and rather shallow soils .
  由于土壤轻松，土层又浅，及时灌溉是很重要的。
• A crop can be sown, weeded, irrigated, and fertilized uniformly .
  一种作物可以均匀一致地进行播种，除草，灌溉和施肥。
• If this runoff water can be accumulated it can be used for farming .
  如果这些流失的水能够积蓄起来，它们就可以用来灌溉。
• However, irrigation has extended both wheat and cotton farming further west .
  但是，灌溉使小麦和棉花的种植进一步向西推移。
• They are already discovering how to colonise venus and to irrigate the moon .
  他们正在探索如何殖民于金星，和如何灌溉月球。