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保护 环境 : 526 phrases in 45 subjects |
| Agriculture | 1 |
| Animal husbandry | 2 |
| Architecture | 2 |
| Astronautics | 1 |
| Automobiles | 5 |
| Aviation | 5 |
| Business | 11 |
| Chemistry | 3 |
| China | 20 |
| Commerce | 2 |
| Consulting | 1 |
| Corporate governance | 1 |
| Demography | 1 |
| Desert science | 3 |
| Earth sciences | 86 |
| Ecology | 36 |
| Economics | 11 |
| Electricity | 1 |
| Electronics | 5 |
| Engineering geology | 1 |
| Environment | 41 |
| Finances | 1 |
| Fish farming pisciculture | 1 |
| Forestry | 2 |
| General | 6 |
| Hydroelectric power stations | 8 |
| Life sciences | 2 |
| Marketing | 1 |
| Metallurgy | 10 |
| Mineralogy | 2 |
| Name of organization | 11 |
| Nautical | 4 |
| Oceanography & oceanology | 2 |
| Oil / petroleum | 1 |
| Patents | 1 |
| Project management | 2 |
| Rail transport | 1 |
| Road construction | 1 |
| Scientific | 5 |
| Space | 5 |
| Technology | 121 |
| Textile industry | 4 |
| United Nations | 81 |
| Water resources | 14 |
| Wind Energy | 1 |
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