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| 镜面反射; 镜像反射 | |||
| 镜面反射 | |||
| 规则反射; 单向反射 | |||
| mirror reflection: 8 phrases in 6 subjects |
| Air defense | 1 |
| Bridge construction | 1 |
| Chemistry | 1 |
| General | 1 |
| Metallurgy | 2 |
| Technology | 2 |
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