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| 1. | Noise has always been the most troublesome problem in seismic prospecting. |
| 噪声始终是地震勘探中最棘手的问题。 |
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| 2. | a troublesome child, problem, headache |
| 让人心烦的孩子、 问题、 头痛 |
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| 3. | Another troublesome problem was settling a date after which no evidence would be admitted. |
| 另一个麻烦的问题是定出一个过后任何证据都不会被承认的日期。 |
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| 4. | It can solve the most troublesome problem of water treaement in cultivating aquarium fishes and pets. |
| * 杀菌有效性强、能、全可靠，可全天候使用，解决了养殖观赏鱼及水族宠物的最大水处理问题。 |
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