English-Hanzi/Dementia is a broad category of brain diseases

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Dementia is a broad category of brain diseases that cause a long-term and often gradual decrease in the ability to think and remember that is great enough to affect a person's daily functioning.

痴呆症是一类广泛的脑部疾病,导致思考和记忆的长期且往往逐渐减少,这足以影响一个人的日常功能。