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n.[机]承盘，挡板；家臣，侍从；[牙科]牙架；保持着 变形： 复数：retainers 英英释义： retainer[ ri'teinə ]n.a fee charged in advance to retain the services of someone同义词：considerationa person working in the service of another (especially in the household)同义词：servanta dental appliance that
