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热云 : 31 phrases in 11 subjects |
| Agriculture | 1 |
| Desert science | 2 |
| Ecology | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Isolation | 1 |
| Oil / petroleum | 3 |
| Space | 3 |
| Technology | 16 |
| United Nations | 1 |
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