to keep changing from one situation, opinion, emotion, etc. to another and back again
نوسان کردن, در تغییر بودن, مدام تغییر کردن
noun
1
a piece of equipment for children to play on consisting of a long flat piece of wood that is supported in the middle. A child sits at each end and makes the see-saw move up and down.
الاکلنگ
2
a situation in which things keep changing from one state to another and back again
نوسان, تغییر متناوب, بالا و پایین شدن
The match was a see-saw battle between the two teams.