cyclicityn.循环性；周期性cyclicadj.循环的；周期性的；环形的cyclic infection循环性侵染cyclic influence周期性影响cyclic economics循环经济Cyclic dipeptide环二肽cyclic aliphatic环脂族cyclic acid film丙烯酸cyclic switching循环切换cyclic resonance循环谐振cyclic selection周期性选择cyclic annealing周期退火