英文：A process, condition, or period of deterioration or decline, as in morals or art; decay.
中文：堕落在道德或藝術方面變壞，或衰落的過程、條件、或期間; 衰敗
英文：Deterioration of intellectual faculties, such as memory, concentration, and judgment, resulting from an organic disease or a disorder of the brain. It is often accompanied by emotional disturbance and personality changes.
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