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| |||
| oxygen requirement | |||
| 氧需 要 量: 6 phrases in 6 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Reproductive biology | 1 |
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