洋底
5.Our 6,000-meter computerized underwater vehicle successfully explored the floor of the Pacific Ocean. 
8.RESEARCH ON THE BENTHIC ECOLOGY ENVIRONMENT,ANT- ARCTIC OCEAN:I.MAXWELL BAY AND ADMIRALTY BAY
9.In the case of the Sumatra quake, the seismic fault fan north to south beneath the ocean floor, while the tsunami waves shot out west and east.
10.small large-mouthed tropical marine fishes common along sandy bottoms; males brood egg balls in their mouths; popular aquarium fishes.
