| 1. | The rain collected in several depressions .
雨水聚积在几处洼地里。 |
| 2. | 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。 |
| 3. | 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。 |
| 4. | 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。 |
| 5. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | The rains washed out fields and flooded lowlands
暴雨冲毁田地，淹没洼地。 |
| 10. | 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 |
