| 单词 | white-to-black frequency swing |
| 释义 | white-to-black frequency swing [¦wīt tǝ ¦blak `frē·kwǝn·sē ´swiŋ] COMMUNICATIONS In a facsimile system employing frequency modulation, the numerical difference between the signal frequencies corresponding to picture white and picture black at any point in the system. |
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