bone of contention

The property left by their father was a bone of contention between the brothers.

他们父亲的遗产成为兄弟间吵的。

The interpretation of this painting has long been a bone of contention among art historians.

这幅画的解释长久以来直是艺术史学家论不休的。

The channeling of E.U. funds to the Palestinian Authority to unofficial or semiofficial accounts was a bone of contention that often troubled many an honest official of the Union.

困扰许多诚实的欧盟官员的端是，是否应该将欧盟的资金打到巴勒斯坦当局的非官方或半官方账户上。