A big problem was that both TCL and Thomson focused on clunky old models made using cathode-ray tubes.
一个大的问题是TCL和汤姆逊二者都是擅长制造使用CRT(阴极射线管)的笨重的老机型。
2
The use of DC electricity is another source of static electric fields, e.g. rail systems using DC, and televisions and computer screens with cathoderay tubes.