常見(jiàn)例句A residency is aperiod of hospital training for medical school graduates. 一段實(shí)習(xí)期是指允許醫(yī)學(xué)研究生在醫(yī)院培訓(xùn)實(shí)習(xí)的時(shí)間。aperiod mutant 無(wú)周期突變體 返回 aperiodity