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81. | steady state wave motion |
| 稳态波动 |
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82. | fluctuating period |
| 波动期间 |
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83. | fluctuation range |
| 波动幅度 |
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84. | undue fluctuation |
| 过度波动 |
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85. | fluctuation ratio |
| 波动比 |
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86. | period of waves |
| 波动周期 |
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87. | oscillating flow rate |
| 波动流量 |
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88. | atmospheric waves |
| 大气波动 |
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89. | oscillating pressure |
| 波动压力 |
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90. | business cycle fluctuation |
| 经济周期波动 |
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