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| 41. | resulted from the bacterial decay of cellulose in vegetable matter under water. |
| 水下植物体中的纤维素经细菌作用也产生甲烷。 |
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| 42. | To drydock vessel for examination, cleaning, painting and under water work. |
| 船进坞检查，清洁，油漆和进行水线下修理工程。 |
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| 43. | under water; e.g. at the bottom of a body of water. |
| 在水下；例如在某个水体的底部。 |
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| 44. | swim under the water |
| 潜泳 |
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| 45. | Los Angeles might disappear under water, but I'll still be here. |
| 洛杉矶可能会消失于水平面之下，但是我将会在这儿。 |
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| 46. | The man can remain under water for more than a minute. |
| 那个人能在水下呆1分多钟。 |
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| 47. | A diesel submarine is able to cruise under water for a short period of time, but a nuclear one is able |
| 柴油潜艇在水下只能航行非常短的时间，而核潜艇在水下航行的时间要长得多。 |
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| 48. | The coach told me how to breathe out under water |
| 教练告诉我如何在水下吐气。 |
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| 49. | A watertight structure within which construction work is carried on under water. |
| 潜水箱一种密不透水的结构物，其中放有修筑用工具并将其载入水下 |
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| 50. | After all the rain, most of the town was under water. |
| 大雨之后，镇里大多数地方都被水淹了。 |
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