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| 有害物质 | |||
| 有毒物质; 毒性物质 (可能对健康或环境造成风险或伤害的一种化学品或混合物。) | |||
| 毒性物; 毒物 | |||
| toxic substance: 19 phrases in 5 subjects |
| Biotechnology | 1 |
| Ecology | 1 |
| Environment | 5 |
| Technology | 9 |
| Water resources | 3 |
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