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| studies and analysis | |||
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研究与分析 : 22 phrases in 10 subjects |
| Aviation | 5 |
| Business | 2 |
| Commerce | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Electronics | 5 |
| Management | 1 |
| Marketing | 1 |
| Navigation | 1 |
| Oil / petroleum | 3 |
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