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ultrasonic frequency 超声波频率
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zero frequency 零频
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frequency of eddies 涡旋频数,涡旋频率
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frequency of irrigation 灌溉次数,灌溉频率
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frequency of occurrence 出现次数,出现频率,重现度
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frequency of oscillation 振荡频率
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frequency of overflow 溢流频率
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frequency of rare floods 稀遇洪水频率
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frequency of snowfall 降雪[量]频率
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frequency of stage 水位频率
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frequency of vibration 振动频率
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frequency of watering 灌水频率
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fresh a.新鲜的,淡的n.淡水河;泛滥,暴涨
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freshen v.[海水]淡化,使变新鲜
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freshet 山洪,洪水(小河流的),春汛,泛滥;入海的淡水河流
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