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| Radio Astron (卫星，苏联); radio astronomy; Radio-Astro (俄罗斯、澳大利亚、加拿大、欧洲空间局、印度、乌克兰、美国等合作研制中的天文卫星，又称光谱-R 卫星/Spektr R) | |||
| radio astronomy (学) | |||
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| radioastronomy (radioastronomia) | |||
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| radioastronomy | |||
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射 电天文 : 49 phrases in 10 subjects |
| Astronomy | 10 |
| Aviation | 1 |
| Communications | 1 |
| Earth sciences | 3 |
| Electronics | 6 |
| General | 3 |
| Nautical | 1 |
| Space | 13 |
| Technology | 10 |
| United States | 1 |
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