frequent-pattern 頻繁模式frequent-flyer scheme [商業(yè)]常客獎勵計劃frequent yawning 數(shù)欠frequent visitor 常客；熟客frequent subtree mining [計算機(jī)科學(xué)技術(shù)]頻繁子樹挖掘frequent subtree [計算機(jī)科學(xué)技術(shù)]頻繁子樹frequent subsequence [計算機(jī)科學(xué)技術(shù)]頻繁子序列frequent spectrum of reflection coefficient [水利工程]反射系數(shù)頻率譜frequent relapse nephrotic syndrome [醫(yī)藥科學(xué)]頻復(fù)發(fā)性腎病frequent nictitation [醫(yī)藥科學(xué)]瞬目過多frequent irrigation 頻繁灌溉frequent flyer program 飛行常客獎勵計劃frequent flyer 飛行?？?/p>frequent flier 飛行常客（尤指在同一航線上旅行的）frequent (adj.) frequent adj. 頻繁的；時常發(fā)生的；慣常的 vt. 常到，常去；時常出入于frequencyrange 頻率范圍frequencymeter 頻率計frequency-sweep method [醫(yī)藥科學(xué)]頻率掃描法frequency-sweep generator 掃描頻率發(fā)生器