常见例句A residency is aperiod of hospital training for medical school graduates. 一段实习期是指允许医学研究生在医院培训实习的时间。aperiodical coil 无规卷曲aperiodical coil(random coil) 无规卷曲, 非周期性螺旋aperiod mutant 无周期突变体 返回 aperiodical