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| изучать среду; исследовать среду | |||
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研究 环 境 : 49 phrases in 8 subjects |
| Ecology | 2 |
| Environment | 1 |
| General | 26 |
| Geology | 1 |
| Name of organization | 7 |
| Oil processing plants | 1 |
| Technology | 2 |
| United Nations | 9 |
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