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pseudo-first-order |
准一级 : 35 phrases in 13 subjects |
Agriculture | 1 |
Automobiles | 1 |
Aviation | 1 |
Chemistry | 1 |
Cryptography | 1 |
Ecology | 4 |
Engineering geology | 1 |
International Monetary Fund | 2 |
Oil / petroleum | 1 |
Space | 3 |
Technology | 13 |
United Nations | 3 |
Water resources | 3 |