| 1. | 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。 |
| 2. | The scranton flap was put behind us, but the hard rock of the middle east impasse remained .
斯克兰顿闯的这场乱子是过去了，但是，中东僵局象一块坚硬的岩石屹立未动。 |
| 3. | Air raid shelters and similar installations are usually located in solid rock for obvious reasons .
空袭掩蔽所和其它类似的设备，出于显而易见的理由，通常置于坚硬的岩石中。 |
| 4. | If there had not been a hard layer of rock beneath the soil , they would have completed the job in a few hours .
如果土壤下面没有坚硬的岩石，他们早就在几个小时内完成这项工作了。 |
| 5. | Under the crust are many layers of hard rock
在地壳的下面是许许多多坚硬的岩石层。 |
| 6. | To build the tunnel , they had to bore through solid rock
为了建设隧道，他们不得不打透坚硬的岩石。 |
| 7. | Between them , these two outcrops of hard , weathered granite make up a quarter of the new island ' s surface area
在他们之间有两块坚硬的岩石，风化的花岗岩组成新岛表面的四分之一。 |
| 8. | If there had not been a hard layer of rock beneath the soil , they would have completed the job in a few hours
如果土壤下面不是有一层坚硬的岩石的话，他们在几小时之内就完成这个工作了。 |
| 9. | The looks of sonamu pine tree resembles the nature of korea for its growing green throughout the year , standing strong enrooted even in the rocks
清松松树长年翠绿，屹立于坚硬的岩石上，象徵韩国坚毅的民族性。 |
| 10. | The west dam faced the inner sea of rocky harbour and was 2 , 470 ft . long and 333 ft . high . the construction of the 2 dams was a complicated process , as 2 cofferdams had to be constructed at each of the sites , before the main dams could be built . these were to keep the dam sites dry for construction
两条主坝建筑工程相当复杂，在兴建主坝之前，需于建筑堤坝地点建造围堰，将海水隔开，抽乾海床范围内的海水，挖除黏土和沙，才筑堤坝，使主坝能稳固地建造在坚硬的岩石上。 |
