It'sounded like he was calling from a hands - free speakerphone inside a car.
聽起來好像他從車里的免提揚聲電話打來的.
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Connecting an ear piece or switching on speakerphone will reduce radiation exposure.
耳機通話和免提都可以減少輻射.
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Speakerphone calls a bit of distortion.
免提通話有點扭曲了.
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