Meanings of vacillates between in English

The story vacillates between the Moor's life before slavery in Morocco through his New World adventure.

Kathy Payton vacillates between ostensibly different worlds.

The doctor vacillates between the two positions.

He vacillates between superstition and faith.

The conflict of diametrically opposing forces shows itself plainly in his attitude which vacillates between the stiffest formality and the easiest assurance.

The so-called Andromeda strain, for example, is still under the sway of an unstable dictator who vacillates between homicidal frenzy and paranoid isolation.

While the weather vacillates between hail showers and glorious bursts of sunshine, there does seem to be an opportunity to picnic most days.