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分布质量 : 30 phrases in 10 subjects |
| Automobiles | 5 |
| Aviation | 3 |
| Business | 1 |
| Chemistry | 1 |
| Electronics | 3 |
| Plastics | 2 |
| Polymers | 1 |
| Space | 2 |
| Technology | 9 |
| Wind Energy | 3 |
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