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| 21. | A convoluted seashell. |
| 盘旋状贝壳 |
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| 22. | acclivous column |
| 盘旋柱 |
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| 23. | hover between life and death |
| 死去活来 |
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| 24. | in a holding pattern |
| 盘旋等待着陆 |
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| 25. | Etc.) hover; |
| 悬停 |
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| 26. | The plane spiralled up in the last two months. |
| 飞机盘旋上升。 |
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| 27. | Take-off, move into a Nose-in Hover, hold hover for five(5) seconds. |
| 起飞后机头朝向操控者，保持静止停悬5秒钟。 |
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| 28. | circle errors of gyroscope |
| 陀螺盘旋误差 |
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| 29. | The Winding Stair |
| 盘旋的楼梯 |
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| 30. | strategic orbit point |
| 战略盘旋点 |
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