名词
中文翻译：电话交换机
同义词：
['telephone exchange', 'telephone switchboard例句：1. The telephoner was a crucial part of the communication system.（电话交换机是通信系统的关键部分。）']
例句：
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1. The telephoner was a crucial part of the communication system.
电话交换机是通信系统的关键部分。
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2. The telephoner had been repaired and is now working properly.
电话交换机已经修理好了，现在工作正常。
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3. The telephoner was responsible for connecting calls between different cities.
电话交换机负责连接不同城市之间的电话呼叫。