有人说连续波雷达的功能,似乎是在人们喧哗嘈杂声中,倾听处于远处森林中小鸟的叫声。对此说法,还会有人进一步地说,若没有人们大声喊叫,小鸟仍保持安静。现在即使还未达到从喧闹声中能倾听到小鸟叫声的程度,但人们已能分离出两种音调,这恰 Some people say that the function of continuous wave radar seems to be in the noise of people noises, listening to the birds in the forest in the distance cry. In this view, some people further said that if no one shouted loudly, the bird remained quiet. Now that even before the humble bird’s noise can be heard from the noise, people have been able to separate two tones,