名词中文翻译
中文翻译：环形主单元
同义词：
['ringback unit', 'ringback unit', 'ringback unit例句：1. The new phone has a ringback unit that can be used to make calls without pressing the phone button.（这款新手机有一个环形回拨单元，可以用来拨打电话而无需按下电话按钮。）']
例句：
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1. The new phone has a ringback unit that can be used to make calls without pressing the phone button.
这款新手机有一个环形回拨单元，可以用来拨打电话而无需按下电话按钮。
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2.The ringback unit is designed to provide audible feedback when the call is answered.
环形回拨单元被设计为在接听电话时提供声音反馈。
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3.The ringback unit helps to reduce the noise level in the office environment.
环形回拨单元有助于降低办公室环境中的噪音水平。