精品学习网考试频道小编应广大考生的需要，特为参加考试的考生策划了“PETS4写作精选短语：bone of contention”专题等有关资料，供考生参考!
bone of contention
(noun)
a disagreement, dispute, or argument about something; a strong difference of opinion; a conflict
EXAMPLE:
A bone of contention was the division of powers between the national and provincial governments.