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| 虚能级; 假想电平 | |||
| 虚能级 (亚原子核系统的能量级) | |||
| 虚拟级 | |||
| virtual level: 6 phrases in 4 subjects |
| Electronics | 2 |
| Information technology | 2 |
| Rail transport | 1 |
| Technology | 1 |
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