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| 51. | polar expedition vessel |
| 极地考察船 |
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| 52. | LUSI (lunar surface inspection) |
| 月球表面考察 |
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| 53. | comprehensive marine exploration |
| 海洋综合考察 |
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| 54. | International Indian Ocean Expedition |
| 国际印度洋考察 |
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| 55. | Review of American Birds |
| 美洲鸟类考察 |
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| 56. | overseas agricultural visit |
| 海外农业考察 |
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| 57. | How long did the expedition last ? |
| 考察历时多久？ |
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| 58. | Inspection and Training: |
| 考察及培训: |
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| 59. | An examination;an investigation. |
| 考察考试；调查 |
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| 60. | make further explorations |
| 进一步探索（考察） |
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