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| nivel de energía; nivel energético | |||
| nivel energético de una partícula | |||
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| niveles de energía | |||
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Energy Level : 17 phrases in 7 subjects |
| Antennas and waveguides | 4 |
| Economics | 1 |
| Electronics | 5 |
| Environment | 1 |
| Meteorology | 1 |
| Physical sciences | 2 |
| United Nations | 3 |