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41. | fictitious pendulum |
| 虚摆 |
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42. | vertical pendulum |
| 竖摆 |
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43. | pendular oscillation |
| 摆振 |
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44. | gravity pendulum |
| 重力摆 |
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45. | equivalent penduleum |
| 等效摆 |
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46. | gyroscopic pendulum |
| 回转摆 |
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47. | equivalent pendulum |
| 引用摆 |
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48. | elliptic pendulum |
| 椭圆摆 |
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49. | damped pendulum |
| 阻尼摆 |
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50. | swing-up of the leg |
| 摆腿 |
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