vacillate /ˈvæsɪˌleɪt/ ( vacillating, vacillated, vacillates )

• 1. 

  V-I If you vacillate between two alternatives or choices, you keep changing your mind. 犹豫不决 [正式]

  例：

  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。

  例：

  We cannot vacillate on the question of the party's leadership.

  在党的领导权问题上我们不能动摇。