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| environment requirement | |||
| environmental challenge | |||
| environmental need | |||
| environmental requirement | |||
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| environmental requirement | |||
| 环境要求: 20 phrases in 10 subjects |
| Automobiles | 1 |
| Business | 1 |
| Corporate governance | 1 |
| Ecology | 6 |
| Environment | 2 |
| General | 1 |
| Metallurgy | 1 |
| Name of organization | 2 |
| Technology | 4 |
| United Nations | 1 |