动词短语
中文翻译：在电话上
同义词：
['over the phone', 'on the line', 'by phone']
例句：
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1. I'll call you back on the phone when I get a chance.
我稍后会回电话给你。
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2. He was on the phone with his boss all night.
他整晚都在给老板打电话。
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3. We need to be on the phone with our clients regularly to keep them updated.
我们需要定期与客户通话，以保持他们的最新状态。