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生命 环境 : 27 phrases in 9 subjects |
| Agriculture | 1 |
| Aviation | 9 |
| Earth sciences | 2 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Genetics | 1 |
| Oil / petroleum | 1 |
| Space | 10 |
| Technology | 1 |
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