两位相邻的农场主因一条争议篱笆线的积怨长达十五年，哪怕双方牲畜在边界上混在一起也不说一句话。
The two neighboring farmers had nursed rancor for fifteen years over a disputed fence line, not speaking a word even when their livestock mingled at the boundary.
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解释
积怨——因长期未解决的领地/财产争议而积累的深层敌意
The two neighboring farmers had nursed rancor for fifteen years over a disputed fence line, not speaking a word even when their livestock mingled at the boundary.
积怨——因长期未解决的领地/财产争议而积累的深层敌意