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global problem |
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 |