 |
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| empty level; unfilled level | |||
| unoccupied level | |||
| empty state (энергетический); unfilled state; unoccupied state; vacant state | |||
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| empty energy level; unfilled energy level | |||
| незаполненный уровень: 10 phrases in 4 subjects |
| Makarov | 3 |
| Nanotechnology | 1 |
| Packaging | 3 |
| Technology | 3 |