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| 直观观察: 22 phrases in 10 subjects |
| Automobiles | 3 |
| Aviation | 5 |
| Economy | 1 |
| Electronics | 1 |
| Genetics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 4 |
| United Nations | 1 |
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