洼地

• The rain collected in several depressions .
  雨水聚积在几处洼地里。
• Whenever it rains , a lot of water accumulates in the low-lying land .
  一下雨，洼地里就存了好些水。
• The mountain is encircled by the doughnut-shaped depression of the caldera .
  山为环形的破火山口洼地环抱着。
• Erodible soil fractions are usually dislodged from projections and trapped in depression .
  可冲蚀土壤部分经常从凸出物剥蚀并降落于洼地。
• By this time the news of what had happened at the hollow was spread all over the neighborhood .
  这时候，洼地出事的消息已经传遍了邻近一带。
• Among the inland bodies of water are an infinite variety of fresh and saline lakes and marshes .
  内陆水域中有无数种类的淡水和咸水湖泊，沼泽和湿洼地。
• The maria are circular depressions covered with dark, loosely packed material-not solid rock .
  “月海”是圆形洼地，覆盖着暗色的松散物质，而不是坚硬的岩石。
• The mass of gas in the depression will increase, and because of its weight the hollow will sag even more .
  洼地中的气体质量会增加，并且由于它的加重，凹地将更加陷下去。
• The rains washed out fields and flooded lowlands
  暴雨冲毁田地，淹没洼地。
• Low or marshy ground washed by tidal waters
  洼地，沼泽由波浪之水流引起的低地或沼泽地