long wave

名词 long wave:

1. a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz)

1. In radio communication, either short or long waves may be used.
   无线电通讯可以采用短波也可以采用长波。
2. A long wave that has reached its peak or broken into foam; a breaker.
   卷浪一种达到顶峰或碎成泡沫的巨浪; 碎浪
3. Radio2 can be heard on the long wave band.
   第二广播电台可在长波段收听到。