bone of contention
idiomPart ofcontention
bone of contention — idiom
1. a subject or issue that two or more people or groups keep arguing about over a l
1.慣用語
釋義
a subject or issue that two or more people or groups keep arguing about over a long period
例句
The ownership of the land has been a bone of contention between the two families for generations.
Working hours became the main bone of contention during the contract negotiations.