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91. | progressive wave motion |
| 前进波动 |
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92. | wave optics |
| 波动光学 |
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93. | foreign exchange fluctuation |
| 外汇波动 |
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94. | mains fluctuations |
| 电源波动 |
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95. | a fluctuating rate |
| 波动汇率 |
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96. | coefficient of fluctuation |
| 波动系数 |
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97. | Price fluctuations |
| 物价波动 |
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98. | oscillatory rhythm |
| 波动韵律 |
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99. | demand-side fluctuation |
| 需求波动 |
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100. | fluctuation effects |
| 波动效应 |
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