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碳定年 : 25 phrases in 10 subjects |
| Chemistry | 2 |
| Desert science | 2 |
| Earth sciences | 1 |
| Ecology | 1 |
| Engineering geology | 4 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Oil / petroleum | 5 |
| Space | 1 |
| Technology | 7 |
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