| 1. | It is free from air, moisture or impurities .
它不含空气，水份和杂物。 |
| 2. | The sunburnt sands drank water like a sponge .
被太阳晒烫的沙子像海绵一样吸收水份。 |
| 3. | The crust seals the soil and prevents the evaporation of water .
这层表皮把土壤封闭，防止水份蒸发。 |
| 4. | Probably most of the uptake and loss water is through the body wall .
水份的吸取及损失的大部分可能是通过体壁进行的。 |
| 5. | This crust dramatically changes the rate at which water filters into the soil .
这层表皮显著地改变了水份渗入土壤的速度。 |
| 6. | Gas bubbles in the ash left holes that store large amounts of water for plant use .
火山灰内的气泡会留下空洞，它可以贮藏大量水份供植物利用。 |
| 7. | In a surface burst, large quantities of earth or water enter the fireball at an early stage and are fused or vaporized .
表面爆炸时，一开始便有大量的泥土或水份被卷入火球中，并熔化或汽化。 |
| 8. | 5 the nourishment water supplies to absorb to have another
5营养水份供给吸收多 |
| 9. | Clay often exists in fields covered with some water
黏土通常产于水份充足的土地。 |
| 10. | 6 . drink plenty of fluid to prevent dehydration
6 .应补充足够水份，以防脱水现象。 |
