The degree of optical opacity of a medium or material, As of a photographicnegative.
一定介质或材料(例如照相感光纸)的不透光程度。
2
The fish collagen has special application in the photographicnegative, the biological material and food industry.
鱼胶原蛋白在照相底片，生物材料和食品行业有特殊的应用。
3
The detail and heft of the man on the shroud was greatly enhanced in the photographicnegative, leading to renewed speculation on its miraculous origin.