他们之间有很深的恩怨。

tāmen zhījiān yǒu hěn shēn de ēnyuàn.

There is a deep-seated grievance between them.

恩怨纠结，不如释怀。

ēnyuàn jiūjié, bùrú shìhuái.

It's better to let go of entangled grievances.

过去的恩怨不值得再计较。

guòqù de ēnyuàn bù zhíde zài jìjiào.

Past grievances are not worth dwelling on.