As a result, a single radiowave from an FM station is only a few meters long, about the size of a car.
所以，一个单独的电波信号从FM电台里出来，对车而言就是几米的距离。
2
Short wave is radio frequency band earliest utilized by human being, and short wave communication is one modern communication method with a long history.
短波是人类最早开发利用的无线电频段，短波通信是历史最为悠久的现代通信手段之一。
3
As a result, a single radiowave from an FM station is only a few meters long, about the size of a car.