long wave

英文解釋：

名詞 long wave:

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

例句：

1. In radio communication, either short or long waves may be used.
   無線電通訊可以採用短波也可以採用長波。
2. A long wave that has reached its peak or broken into foam; a breaker.
   卷浪一種達到頂峰或碎成泡沫的巨浪; 碎浪
3. Radio2 can be heard on the long wave band.
   第二廣播電台可在長波段收聽到。