vacillates
v．犹豫不决，摇摆不定：在决定、意见或行动上反复无常，不能果断地做出决定。
例句
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。
《柯林斯英汉双解大词典》
He vacillates from agile, amiable, and arch to repetitive and awkward.
他摇摆不定的敏捷，和蔼可亲，并拱重复和尴尬。
Suffering is energy that moves, but sticks as it vacillates from side to side.
折磨是可以运动的能量，但是因为从一面到另一面来回振荡而粘滞。
