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容许 浓 度 : 81 phrases in 20 subjects |
Agriculture | 1 |
Animal husbandry | 1 |
Architecture | 1 |
Automobiles | 1 |
Biotechnology | 1 |
Chemistry | 1 |
Desert science | 1 |
Earth sciences | 10 |
Ecology | 7 |
Environment | 2 |
General | 1 |
Metallurgy | 1 |
Nuclear physics | 1 |
Oil / petroleum | 2 |
Refrigeration | 1 |
Space | 2 |
Sports | 2 |
Technology | 35 |
Water resources | 8 |
Wind Energy | 2 |