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光象 : 210 phrases in 15 subjects |
| Astronautics | 3 |
| Astronomy | 1 |
| Botany | 3 |
| Chemistry | 2 |
| Ecology | 1 |
| Electronics | 1 |
| General | 42 |
| Medical | 1 |
| Military | 9 |
| Oil and gas | 1 |
| Oil processing plants | 4 |
| Optics branch of physics | 2 |
| Photography | 1 |
| Physics | 3 |
| Technology | 136 |
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