名词短语
中文翻译：双音多频率
同义词：
['双音调，多频率例句：1. The dual tone system is used to distinguish between different languages.（双音系统用于区分不同的语言。）']
例句：
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1. The dual tone system is used to distinguish between different languages.
双音系统用于区分不同的语言。
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2.Multifrequency technology is used in radar systems to improve accuracy.
多频率技术用于雷达系统中提高准确性。
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3.The dual tone and multifrequency feature of the phone allows users to customize their ringtones.
手机的双音调和多频率功能允许用户自定义铃声。