例句:以低于信号中最高频率两倍的频率进行信号取样时出现的一种效应,即当由取样状态还原时,还原后的信号将不再含有原来信号中的高频成分,并将显示出虚假的低频信号。 An effect that occurs when a signal is sampled at a rate less than twice the highest frequency present in the signal.The subsequent signal recovered from the samples will not