system frequency短语¹³¹⁶²⁰⁺³ 基本例句 系统频率 The calculating result in practical engineering shows that the transient effect on demodulation probability of error is very low even when the system frequency hopping is at middle-high speeds. 本文结合工程实践的计算表明,即使在中高速跳频时,暂态过程对误码率的影响也是很小的。 cnki