I am vacillating between leaving and staying on.

我在去和留之间犹豫不决。

youdao

He is vacillating between leaving and staying on.

他在去和留之间举棋不定。

youdao

The voters are vacillating between the two candidates.

选民在两个候选人之间举棋不定。

youdao

Yeats's late poems speak from the point of view of Jane, more often than not, and yet powerfully, - we do see him vacillating from different-- between different points of view.

叶芝的晚期诗歌从珍妮的角度讲话，经常是这样，但很有力，我们也确实发现他-,在不同的观点间举棋不定。

耶鲁公开课 - 现代诗歌课程节选

"The Next Day, " his 26th album, finds Bowie very much alive and vacillating between forward-looking restlessness and outright nostalgia.

CNN: Review: David Bowie's first new album in 10 years