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分布平 衡 : 15 phrases in 10 subjects |
| Agriculture | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 1 |
| International Monetary Fund | 1 |
| Metallurgy | 1 |
| Polymers | 1 |
| Space | 2 |
| Technology | 5 |
| Wind Energy | 1 |
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