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化学效应 : 23 phrases in 11 subjects |
| Agriculture | 2 |
| Chemistry | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 4 |
| Electronics | 2 |
| Engineering geology | 1 |
| Environment | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 7 |
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