Not Vacillate不贰其心
equipoise vacillate使平衡
to vacillate拿不定主意
vacillate between在￥之间摇摆不定
vacillate between two opinions在两种意见之间游移不定
hesitate and vacillate彷徨动摇
Do not vacillate不要左右摇摆
V-I（不及物动词） If you vacillate between two alternatives or choices, you keep changing your mind. 犹豫不决 [正式]
She vacillates between men twice her age and men younger than she.
她在两个男人之间摇摆不定，一个年龄比她大一倍，一个比她小。