一定介质或材料(例如照相感光纸)的不透光程度。
The degree of optical opacity of a medium or material, As of a photographic negative.
当选择感光纸时，应以能表现被拍物体色调层次为准。
Bromide papers must be accordingly choosed to give distinct gradation.
在电化学感光纸的接收站可将信息再次生成。当电流通过感光纸会留下一带蓝色的印记。
The message wasreproduced at the receiving station on electrochemically sensitivepaper, which left a blue mark when an electric current was passedthrough it.
在电化学感光纸的接收站可将信息再次生成。当电流通过感光纸会留下一带蓝色的印记。
The message wasreproduced at the receiving station on electrochemically sensitivepaper, which left a blue mark when an electric current was passedthrough it.
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