Now, to get a license – an amateur radio license in the United States, back in the 70s it was necessary for you to take a test of your electronic knowledge – of your knowledge of radios and communication devices or equipment.

现在，要获得执照——美国的业余无线电执照，早在 70 年代， 你就必须参加电子知识考试——你对无线电和通信设备或设备的了解。