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| 51. | atomic propulsion |
| 原子推进 |
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| 52. | plasma propulsion |
| 等离子体推进 |
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| 53. | perigee propulsion |
| 近地点推进 |
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| 54. | propulsive horsepower |
| 推进马力 |
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| 55. | propelling movement |
| 推进运动 |
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| 56. | spacecraft propulsio |
| 航天器推进 |
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| 57. | push with all might |
| 全力推进 |
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| 58. | propulsion trial |
| 推进试验 |
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| 59. | propulsive thrust |
| 推进推力 |
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| 60. | propulsive performance |
| 推进性能 |
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