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Chinese dictionary
derogbite the hand that feeds one; requite kindness with ingratitude; return evil for good; repay good with evil
他从没亏待过任何人,可是大家都以怨报德。
He had never let anyone down, but his kindness was always repaid with ungrateful treachery.
不要以怨报德。
Don't recompense good with evil.