1.
marine benthos laboratory
海洋底栖生物实验室
2.
Hydrographers explore the bed of the ocean.
水道学家勘探海洋底。
3.
The minerals, calcium, and sulfur were at the bottom of the ocean.
矿物质、钙以及硫磺均存在于海洋底部。
4.
Isolation, Culture and Application of Benthic Diatoms;
海洋底栖硅藻的筛选、培养和应用研究
5.
The floor of a body of water, especially the sea.
底，海底水体，尤其是海洋的底部
6.
the ocean, forest, valley, cave floor
海洋的底、 森林的地面、 谷底、 洞底.
7.
usually solitary bottom sea basses of warm seas.
通常独居在温带海洋洋底的海鲈。
8.
the location of such regions with respect to other uses of the sea and seabed, such as fisheries and navigation;
海洋和海底的应用，如渔业和航海；
9.
offshore drilling
海底钻探;海上钻井;海上钻探;海洋钻井;海洋钻探;近海钻探;滨外钻探
10.
The ground or lowermost surface, as of a forest or an ocean.
底底层或最低层，如森林或海洋的最底层
11.
small bottom-dwelling shark found along both Atlantic coasts.
出没于大西洋海岸的海底小鲨鱼。
12.
Marine, aerial and sea-bottom gravimeter measurements
海洋、航空和海底重力测量
13.
marine eellike mostly bottom-dwelling fishes of northern seas.
北部海洋中大多数底栖的似鳗海鱼。
14.
which stand nearly three miles above the floor of the open ocean.
高出辽阔海洋海底近三英里。
15.
Seamounts, underwater volcanoes, Rift Valley, the mid-ocean ridge,constitute a rich world of the ocean floor.
海底山脉、海底火山、裂谷、大洋中脊等等，构成了丰富的海底世界。
16.
The floor of the Atlantic ridge in the middle from north to south
大西洋洋底在中部形成由北向南的海脊
17.
The floor of the Atlantic ridges in the middle from north to south.
大西洋洋底在中部形成由北向南的海脊。
18.
cable across North Atlantic
横贯大西洋的通讯海底电缆