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光质量 : 44 phrases in 10 subjects |
| Agriculture | 2 |
| Aviation | 1 |
| Chemistry | 2 |
| Electronics | 9 |
| General | 1 |
| Geology | 1 |
| Metallurgy | 1 |
| Space | 6 |
| Technology | 20 |
| Wind Energy | 1 |
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