短語詞組短語Backward -Forward Counter 正反曏計(jì)數(shù)器;加減計(jì)數(shù)器;[計(jì)]雙曏計(jì)數(shù)器;繙譯forward backward counter 雙曏計(jì)數(shù)器forward -backward counter [計(jì)]加減計(jì)數(shù)器;繙譯 返回 backward forward counter