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同位 素测量 : 29 phrases in 9 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geology | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Technology | 21 |
| United Nations | 1 |
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