a bone of contention

US /ə ˌboʊn əv kənˈten.ʃən/
UK /ə ˌboʊn əv kənˈten.ʃən/
"a bone of contention" picture
1.

争论的焦点, 争执的根源

a subject or issue over which there is continuing disagreement

:
The division of assets became a bone of contention during the divorce proceedings.
资产分割在离婚诉讼中成了争论的焦点
The new parking policy has been a bone of contention among residents.
新的停车政策一直是居民们争论的焦点