idiom · to retreat ninety li as a historical military gesture of respect or strategy to avoid conflict

为了履行当年的诺言，晋文公在战场上主动退避三舍。

idiom · to assiduously avoid or keep a distance from someone or something, often out of fear or respect

提起那位脾气火爆的经理，员工们个个都退避三舍。