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限制空间 : 44 phrases in 14 subjects |
| Agriculture | 1 |
| Artificial intelligence | 1 |
| Automobiles | 1 |
| Aviation | 3 |
| Business | 1 |
| Electronics | 15 |
| General | 3 |
| Information technology | 3 |
| Management | 1 |
| Oil / petroleum | 1 |
| Polymers | 1 |
| Radio | 2 |
| Space | 8 |
| Technology | 3 |
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