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31. | synchronous alternator |
| 同步发电机;同步交流发电机 |
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32. | The unoccupied orbital are called virtual orbitals. |
| 未占轨道叫虚轨道。 |
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33. | track conjunction |
| 轨道联结|轨道连结点 |
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34. | geostationary transfer orbit |
| 对地静止转移轨道(转移轨道) |
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35. | osculating orbit |
| 密切轨道;吻切轨道 |
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36. | picture synchronization |
| 帧同步|图象同步 |
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37. | orbital elements |
| 轨道根数;轨道元 |
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38. | time and frequency synchronization |
| 时间同步与频率同步 |
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39. | Practice; course; path: |
| 轨道 |
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40. | stationary orbit system |
| 静止轨道系统;静止轨道系统 |
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