不及物动词

1. 犹豫不定;踌躇;拿不定主意
If you vacillate between two alternatives or choices, you keep changing your mind.

1. move or sway in a rising and falling or wavelike pattern

e.g. the line on the monitor vacillated

Synonym: fluctuatewaver

2. be undecided about something
waver between conflicting positions or courses of action

e.g. He oscillates between accepting the new position and retirement

Synonym: hovervibrateoscillate