| 1. | 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。 |
| 2. | The earth is covered by huge plates made of rock
地球被巨大的岩石层包围着。 |
| 3. | This is a cliff composed of quartz sandstone that is well bedded
由石英砂岩构成的悬崖，岩石层理发育。 |
| 4. | Separate rock layers , or plates , under the oceans and continents move very slowly
海洋和陆地下面的岩石层或板块在缓慢地运动。 |
| 5. | These remains were buried deep below levels of rock over time and under great pressure
这些化石长期深埋于岩石层中，并承受着高压。 |
| 6. | This thrust can be sudden and projectile , with the rock flake then crashing down again
这种（一个板块对另一个板块的）刺入可以是很突然的爆发式的，岩石层再一次彻底下沉了。 |
| 7. | Volcanoes tend to exist along the edges between tectonic plates , massive rock slabs that make up earth ' s surface
火山往往位于地壳板块交接带，那里的地表由厚重的岩石层构成。 |
| 8. | Not viable , as it will have to be built wholly within rock at a level of ranging from - 65mpd to - 80mpd
：不可行，因为必须在主水平基准面以下65米至80米之间的岩石层建造整条隧道。 |
| 9. | Men must study the rocks carefully . when they think that the rocks in a certain place may contain oil , a metal tower is bulit
人们必须仔细研究岩石，当勘察出某地的岩石层下可能含有石油时，就要建造一个金属井架。 |
| 10. | With concrete measures adopted , the pipeline crossing with directional drilling technique in rocky stratum of middle reaches of yangtse river succeeded for the first time
通过具体实施，在长江中游岩石层中首次采用水平定向钻技术穿越原油管道获得成功。 |
