radioteletype

例句：

1. 1. The new phone has a built-in radioteletype feature that makes it easy to stay in touch with friends and family.
   这款新手机内置了无线电电话功能，使与朋友和家人保持联系变得轻而易举。
2. 2.In the old days, people used to communicate over long distances by radioteletype.
   在旧时代，人们通过无线电电话进行长距离通信。
3. 3. With the development of technology, radioteletypes have been replaced by more advanced forms of communication like the internet and smartphones.
   随着科技的发展，无线电电话已被更先进的通信形式如互联网和智能手机所取代。