proportionaladj.成比例的；相称的n.[数]比例项proportional sampling比例采样,比例抽样,按比例抽样proportional expenses比例费用proportional dividers比例规proportional reverser比例反向器proportional coupling比例偶合proportional compasss比例规proportional shifting比例偏移proportional feedback比例反馈,比例回授Proportional overflow比例溢流阀proportional division比例除法