降雨

• I am in on the rain problem .
  我对降雨的问题颇有了解。
• Rain or snow falls when a cloud is cooled suddenly .
  当一块云突然变冷时，就降雨或降雪。
• A copious rain began to fall .
  沛然降雨。
• Clouds are sometimes seeded with silver iodide to induce precipitation .
  人们有时在云里播撒碘化银，以诱使降雨。
• The success of their efforts varies greatly, depending on rainfall conditions .
  他们努力的成绩变化很大，这决定于降雨情况。
• Bournes are a particular case with a seasonal flow depending on winter rainfall .
  歇河属于特殊情况，其季节性水流依赖于冬季降雨。
• With such irregular rain patterns, normal rain-fed farming is not possible .
  在这种不规则的降雨情况下，依靠正常雨水耕作是不可能的。
• It is only where rainfall is continued that continuous flow systems develop .
  只有在连续降雨的情况下，水的连续流动体系才会得以发展。
• When rain falls, the loess particles on the surface layer swell and form a crust that is almost impermeable to water .
  降雨时，表层的黄土粒就发生膨胀并形成一层几乎是不透水的表皮。
• Rainfall frequency and amount are thus crucial factors in determining the position of deposition in a soil profile .
  降雨次数和降雨量是左右溶质在土壤剖面中沉积位置高低的决定性因素。