irrigation

• There is increasing switch to drip irrigation in all areas .
  所有地区转换成滴灌的趋势正在增加。
• 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。
• 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。
• Governments in many countries spend large amounts of resources on irrigation .
  许多国家的政府在水利化方面花费了大量资金。
• 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。
• Irrigation has been used where needed and modern chemical to control weeds .
  需水的地方有了灌溉设施，并且采用了现代化学药剂以控制杂草。
• This irrigation project requires a highly developed technical and interpretive expertise .
  这项灌溉工程需要高度发展的技术和说明的专门知识。