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分 布序列 : 17 phrases in 10 subjects |
| Business | 2 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Mathematics | 2 |
| Plastics | 1 |
| Polymers | 3 |
| Space | 1 |
| Sports | 1 |
| Technology | 4 |
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