名词
中文翻译：拨号脉冲
同义词：
['telephone pulse', 'dial pulse']
例句：
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1. The doctor used a dial pulseto diagnose the patient's condition.
医生使用拨号脉冲诊断病人的状况。
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2. Dialingthe emergency number is the first step inresponding to an emergency.
拨打紧急电话是应对紧急情况的第一步。
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3. The dial pulse wastransmitted over the radio waves and then sentto the receiver.
拨号脉冲通过无线电波传输，然后发送到接收器。