| 1. | The sea floor is spreading away from the mid-ocean ridges .
海底正在从大洋中脊扩张开来。 |
| 2. | One thing is certain: the sea floor is no longer the province of geoscientists alone .
有一件事是肯定的：海底不再是地球科学家所独占的领域了。 |
| 3. | In some areas even aragonitic shells of the pelagic molluscs pteropods coat the sea floor .
在有些地区，甚至深海软体动物翼足类的文石贝壳可铺满海底。 |
| 4. | Calcareous sediments accumulated on a sea floor and eventually were compacted and cemented to form limestone .
钙质沉积物堆积在海底，最后压紧并胶结形成石灰岩。 |
| 5. | The sea floor of this continental shelf usually undulates gently, rising occasionally to the surface in offshore banks or island .
这个大陆架海底通常缓慢起伏，偶尔以岸外的砂洲和岛屿的形式露出水面。 |
| 6. | Despite precaution, 20 minutes after beginning to traverse the bottom, the huge sled smashed into the rocky sea floor .
尽管采取了一些预防措施，但是在横越海底20分钟以后，那个巨大的橇状装置还是撞进了多岩石的海底。 |
| 7. | It is barely ten since systematic deep ocean bathymetry revealed the structure of rifts, fractures and trenches associated with sea floor spreading .
系统的深海深度测量揭示了与海底扩张有关的狭谷带、断裂带和海沟的结构。 |
| 8. | Land the tgb to sea floor and observe with the sub sea
下基板到海底，用水下电视观察。 |
| 9. | High frequency seismic system for detailed mapping of sea floor
海底详细绘图高频地震系统 |
| 10. | And the sulphide mineral deposits lie directly on the sea floor
而硫化物矿藏直接坐落在海床上。 |
