| 51. | This creature lives in the depth of the ocean . |
| 这种生物生活在海洋深处。
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| 52. | The tidal waves were caused by a great earthquake on the ocean bottom near Alaska. |
| 海啸是由靠近阿拉斯加的洋底发生剧烈地震而引起的。
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| 53. | Australia's " Ocean to Ocean" railway. |
| 横穿澳大利亚的铁路。
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| 54. | During a discussion of ocean life we got off on the subject of sharks. |
| 在一次关于海洋生物的讨论中，我们的话题不知不觉地转到了鲨鱼上。
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| 55. | The great ship plowed (across) the ocean . |
| 那艘大船在海洋上破浪前进。
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| 56. | China Ocean Shipping Company. |
| 中国远洋运输公司。
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| 57. | The message is speeding its way along thousands of miles of the ocean bed. |
| 这消息正沿着数千里的海底（电缆）快速传递出去。
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| 58. | It was like fishing for a needle in the ocean . |
| 这就像大海捞针。
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| 59. | explore the ocean bed |
| 探测海底
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| 60. | islands in the Pacific Ocean |
| 太平洋上的岛屿
|