短语词组短语rotor vacillation 转子摇摆vacillation cycle 游移周期vacillation phenomena 游移现象vacillation õ 踌躇pointer vacillation 指针摆动climatic vacillation 气候摆动vacillation factors 波动因素Vacillation change 振荡变化pertinacity vacillation 顽固 返回 vacillation