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| global problem | |||
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全 球问题 : 19 phrases in 10 subjects |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Finances | 3 |
| International trade | 1 |
| Project management | 1 |
| Refrigeration | 1 |
| Technology | 2 |
| United Nations | 6 |
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