名词
中文翻译：电报机
同义词：
['telegraph key', 'telegraph instrument key']
例句：
-
1.The engineer used the telegraph sounder key to send a message to his colleagues.
工程师使用电报机键向同事发送信息。
-
2.The telegraph sounder key was the only way to communicate with the distant villagers.
电报机键是唯一与远方村民沟通的方式。
-
3. The telegraph sounder key was essential for maintaining communication during emergencies.
在紧急情况下，电报机键是保持通信的关键。