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| 41. | International Indian Ocean Expedition |
| 国际印度洋考察 |
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| 42. | Review of American Birds |
| 美洲鸟类考察 |
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| 43. | How long did the expedition last ? |
| 考察历时多久？ |
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| 44. | Explore westward or wherever. |
| 向西或到什么别的地方去勘探。 |
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| 45. | An examination;an investigation. |
| 考察考试；调查 |
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| 46. | Inspection and Training: |
| 考察及培训: |
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| 47. | overseas agricultural visit |
| 海外农业考察 |
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| 48. | make further explorations |
| 进一步探索（考察） |
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| 49. | polar expedition vessel |
| 极地考察船 |
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| 50. | As you explore music, |
| 当你探索音乐时， |
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