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| 越境污染 | |||
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| 跨界污染 (由一个国家产生而传送到其它国家的被污染的空气、水或其它污染物。) | |||
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transboundary pollution : 7 phrases in 3 subjects |
| Ecology | 2 |
| Technology | 2 |
| United Nations | 3 |
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