Good intentions are not met with good returns; kindness goes unrewarded or is met with ingratitude.
他好心帮邻居照看宠物，结果宠物不小心跑丢了，反被邻居抱怨，真是好心没好报。
He kindly offered to look after his neighbor's pet, but the pet accidentally ran away, and he ended up being blamed by the neighbor. It truly was a case of good intentions not being met with good returns.
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