dialling tone

英 [ˈdaɪəlɪŋ təʊn] 美 [ˈdaɪəlɪŋ toʊn]

n.  (电话的)拨号音

牛津词典

noun

  1. （电话的）拨号音
    the sound that you hear when you pick up a telephone that means you can make a call
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    柯林斯词典

    1. (电话的)拨号音
      The dialling tone is the noise which you hear when you pick up a telephone receiver and which means that you can dial the number you want.

        1. in AM, use 美国英语用 dial tone

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