fluctuer bedeutet auf Englisch

fluctuate [fluctuated, fluctuating, fluctuates]▼◼◼◼(to vary irregularly; to swing)
verb
[UK: ˈflʌk.tʃʊeɪt] [US: ˈflʌk.tʃə.ˌwet]The price of gold fluctuates daily. = Le prix de l'or fluctue quotidiennement.