In filming and recording， (a) an intermediate duplicate of a film from which prints are made, to protect the original; (b) a spare, reserve copy of a sound recording.; 在電影和錄音、錄象技術(shù)中,(1)膠片的中間復(fù)制品,由此制作正片以保護原版; (2)音響記錄的備用、保存版。