Who do you talk to on the radio set? And who talks to you?

通过这种电台你和谁通话？还是谁和你通话？

Steve! Steve, please.It's just a ham radio set. A lot of people have them.

史蒂夫！史蒂夫，求你别这样说了。那其实就是一套业余无线电设备。

And it was portable, unlike the vacuum tube-based radio sets from the 1940s and before.

与 1940 年代及之前的基于真空管的收音机不同，它是便携式的。

Also, initially vacuum tubes were expensive – a radio set often used just one, but a computer might require hundreds or thousands of electrical switches.

此外，最初真空管非常昂贵——一个收音机通常只用一个，但是计算机可能需要数百或数千个电子开关。