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光分布 : 48 phrases in 11 subjects |
| Astronomy | 1 |
| Chemistry | 1 |
| Cinema equipment | 1 |
| Construction | 3 |
| Ecology | 1 |
| Electronics | 12 |
| General | 11 |
| Nanotechnology | 1 |
| Radio | 3 |
| Technology | 13 |
| Telecommunications | 1 |
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