rumble on
phrasal verb with rumble verb uk/ˈrʌm.bəl/ us/ˈrʌm.bəl/
（争议）持续了很久（没有被解决）
If something such as a disagreement rumbles on, it continues for a long time without being resolved.
The dispute rumbled on for months. 这场争执持续了好几个月。
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