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| 污染 浓度: 84 phrases in 12 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Chemistry | 1 |
| Desert science | 1 |
| Earth sciences | 3 |
| Ecology | 7 |
| Electronics | 1 |
| Environment | 1 |
| Refrigeration | 1 |
| Technology | 48 |
| Water resources | 15 |
| Wind Energy | 3 |
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