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组 容量 : 17 phrases in 11 subjects |
| Advertising | 1 |
| Automobiles | 1 |
| Business | 1 |
| Chemistry | 1 |
| Electronics | 3 |
| Hydroelectric power stations | 2 |
| Mathematics | 1 |
| Refrigeration | 2 |
| Space | 1 |
| Technology | 3 |
| Wind Energy | 1 |
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