“发报机”造句

发报机滴滴答答地发出电报.
The telegraph ticked out a message.

一台发报机可发射两种讯号:点和线.
A telegraph can transmit two different signals : a dot and a dash.

这个简易的发报机在测试中的表现是出人意料地好.
This simple transmitter has been shown in tests to work surprisingly well.