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In facsimile, a picture having a range of toneslying between picture black and picture white.
在传真技术中,具有一系列处在图象黑电平与白电平之间色调的图象。
youdao
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In facsimile, a picture having a range of toneslying between picture black and picture white.
在传真技术中,具有一系列处在图象黑电平与白电平之间色调的图象。
youdao