fad.ing
n.(名词)A waning; a decline:衰落;下降:例句:.The final factor in the fading of the Renaissance was the Counter Reformation.(Will Durant).最终导致文艺复兴走向衰退的因素是反改革.(威尔·杜兰特)
Fluctuation in the strength of radio signals because of variations in the transmission medium.时强时弱:由于传播中介的变化而引起的无线电波信号的强弱波动