因为他们两个都是无线电的业余爱好者，所以每天都能通过无线电波与对方保持联系。 As they were both amateur radio enthusiasts they were able to keep in daily touch(with each other) over the air.
无线电传真通过无线电波传送的照片，图像上的点由接收到的每一个电脉冲重新合成 A photograph transmitted by radio waves, each image point being reproduced by a received electric impulse.
