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| 分块矩阵 | |||
| 块矩阵 | |||
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block matrix : 15 phrases in 7 subjects |
| Artificial intelligence | 1 |
| Automobiles | 2 |
| Chemistry | 2 |
| Mathematics | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 6 |
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