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| 51. | An expert on words. |
| 文字专家 |
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| 52. | data processing expert |
| 数据处理专家 |
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| 53. | corrosion expert |
| 防锈专家 |
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| 54. | panel of experts |
| 专家小组 |
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| 55. | assessment specialist |
| 评定专家 |
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| 56. | an eye specialist |
| 眼科专家 |
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| 57. | an atom scientist |
| 原子能专家. |
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| 58. | fire service expert |
| 消防工作专家 |
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| 59. | a cookery expert |
| 烹调专家 |
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| 60. | aviation safety specialist |
| 航空安全专家 |
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