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资源级 : 20 phrases in 10 subjects |
| Business | 1 |
| Earth sciences | 1 |
| Economy | 2 |
| Electronics | 4 |
| Geology | 1 |
| Name of organization | 5 |
| Space | 2 |
| Technology | 1 |
| United Nations | 2 |
| Wind Energy | 1 |
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