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21. | jiggling in time to the music |
| 随着音乐摇摆 |
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22. | pitching of locomotive |
| 机车纵向摇摆 |
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23. | The swings back and forth. |
| 秋千前后摇摆。 |
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24. | motion recorder |
| 摇摆参数记录器 |
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25. | A wobbling motion. |
| 摇摆的动作 |
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26. | hydraulic oscillating cylinder |
| 液压摇摆油缸 |
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27. | The leaves dangled in the wind. |
| 树叶随风摇摆。 |
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28. | A wobble or roll. |
| 摇晃或摇摆 |
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29. | The branches of the willow trees swayed in the breeze. |
| 柳枝迎风摇摆。 |
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30. | average swing angle |
| 平均摇摆角 |
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