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| 51. | A picture depicting an expanse of scenery. |
| 风景画描绘这种景色的图片 |
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| 52. | an outer-space missile |
| 太空导弹 |
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| 53. | astrobiology n. |
| 太空生物学 |
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| 54. | A broad, level, open expanse of land. |
| 原野，旷野一宽广的、水平的、开阔的土地 |
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| 55. | an aerospace vehicle |
| 太空运载工具 |
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| 56. | A wide, unbroken expanse, as of ice. |
| 广阔的一大片一处宽广辽阔绵延不断的区域，比如冰原 |
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| 57. | a spaceborne satellite. |
| 太空卫星 |
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| 58. | "field:a broad, level, open expanse of land." |
| "原野,旷野:一宽广的、水平的、开阔的土地." |
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| 59. | European Space Agency (ESA): Western European space and space-technology research organization headquartered in Paris. |
| 欧洲太空局:西欧的太空和太空技术研究组织,总部设在巴黎。 |
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| 60. | This is an expanse of open country. |
| 这是片空旷的原野。 |
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