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| 效应浓度; 50%半中毒浓度 | |||
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effect concentration : 23 phrases in 7 subjects |
| Business | 1 |
| Earth sciences | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 13 |
| Water resources | 4 |
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