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| 美国宇航局通信网络 | |||
| 国家航空航天局通信网 | |||
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| 国家航空航天局通信网 | |||
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| 国家航空和航天局通信网 | |||
| NASA communications network: 4 phrases in 3 subjects |
| Earth sciences | 1 |
| Space | 1 |
| United States | 2 |
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