a bone of contention

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

爭論的焦點, 爭執的根源

a subject or issue over which there is continuing disagreement

:
The division of assets became a bone of contention during the divorce proceedings.
資產分割在離婚訴訟中成了爭論的焦點
The new parking policy has been a bone of contention among residents.
新的停車政策一直是居民們爭論的焦點