| 释义 |
picture black(white) | In facsimile, that value of the chosen characteristic of the signal (e.g., its frequency or amplitude) which represents the darkest (or brightest) areas of the document being transmitted.; 在传真通信中所选择的信号特性值,表示所要传送文卷的 最暗［最亮］部分的频率或电平范围。 |
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