| 1. | The petrified tree was a book of nature .
树木化石是大自然的历史记录。 |
| 2. | It depends on the identification of zone fossils .
它依赖于分带化石的鉴别。 |
| 3. | Igneous rocks do not contain fossils .
火成岩不含化石。 |
| 4. | The sediments are characteristically very fossiliferous .
沉积物的特征是含化石很多。 |
| 5. | In these respects, the fossils resemble modern humans .
在这些方面，这些化石类似于现代人类。 |
| 6. | The hader and laetolil hominids appear to be unique .
哈达尔和莱特利尔的化石人类堪称举世无双。 |
| 7. | The search for fossil man then shifted to eastern africa .
对化石人的探索工作转移到了非洲东部。 |
| 8. | The rocks themselves bear another kind of evidence--the fossils .
岩石本身还拥有另一种证据化石。 |
| 9. | Scientists have dated the fossils by their bone structure .
科学家根据那些化石的骨骼结构确定其年代。 |
| 10. | At this distance of time it is difficult to date the fossil .
时间隔得这么久了，很难确定这化石的年代。 |
