recording telegraph

例句：

1. 1. The recording telegraph was invented to transmit voice messages over long distances.
   记录电报被发明用来在长距离上传输语音信息。
2. 2.The telegraph was the first form of communication that could be used for both writing and speaking.
   电报是第一种既能用于书写又能用于口语的通信方式。
3. 3. In the old days, people would send telegrams by hand to keep in touch with each other.
   在旧时代，人们会用手写信来保持彼此的联系。