n.非周期性(非調諧性)

A residency is aperiod of hospital training for medical school graduates. 一段實習期是指允許醫(yī)學研究生在醫(yī)院培訓實習的時間。

aperiodicity of this kind of decline and sex of the corresponding period, crisis degree is small, economy of phenomenon of duration short; 這種衰退無周期性和同期性 ,危機程度輕 ,持續(xù)時間短 ;

Aperiodicity energy 非周期能量

aperiodicity stretch 非周期性延伸