cyclicityn.循环性；周期性cyclicadj.循环的；周期性的；环形的cyclic oxidation循环氧化cyclic indicator周期指标cyclic frequency角频率cyclic sulfoxide环状亚砜cyclic depletion周期性耗竭cyclic diolefine环二烯cyclic carbonate环状碳酸酯cyclic condition循环条件cyclic phosphate环状磷酸酯cyclic psychosis循环性精神病,环性精神病