telegraph key

1. Like Sammuel morse's work on the telegraph, bell's determination also to do what seemed impossible was the key to his success.
   象塞缪尔莫尔斯致力于电报一样，贝尔取得成功的关键也在于决心做似乎不可能做到的事。
2. The operation of using a telegraph key.
   使用电报按键的操作过程。

noun

1. key consisting of a lever that sends a telegraph signal when it is depressed and the circuit is closed