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| biogeochemical cycle | |||
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化学循环 : 23 phrases in 10 subjects |
| Agriculture | 2 |
| Desert science | 2 |
| Ecology | 2 |
| Electronics | 1 |
| Environment | 1 |
| Forestry | 3 |
| General | 1 |
| Genetics | 1 |
| Shipbuilding | 1 |
| Technology | 9 |
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