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| environmental limit | |||
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环境极 限 : 13 phrases in 9 subjects |
| Architecture | 1 |
| Chemistry | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 3 |
| Engineering geology | 1 |
| Technology | 2 |
| Water resources | 1 |
| Wind Energy | 2 |
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