| 1. | The only road was of the "shelf" variety .
其间仅有的路为各种“岩面”。 |
| 2. | They are all descended from the rock-pigeon .
它们都是从野岩鸽传衍而来。 |
| 3. | A small section of rock juts out into the harbour .
山岩的一小角突入港湾。 |
| 4. | The casing was driven into the soft muds in the top .
套管被送入软岩粉顶。 |
| 5. | Thus clays and shales tend to be impermeable .
因此粘土和页岩就往往不透水。 |
| 6. | Sandstones are, as a rule, interbedded with shales .
砂岩通常都与页岩互层。 |
| 7. | The sandstone and shale units are of the same age .
砂岩和页岩单元是同时的。 |
| 8. | The core pellet is placed in a chamber .
把岩芯放在容器中。 |
| 9. | She threw herself from the precipice .
她从岩上跳了下去。 |
| 10. | A sere on uncovered rock is a lithosere .
在光秃岩石上的演替系列是岩生演替系列。 |
