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花粉过敏可以用英文表示为 "pollen allergy"。花粉过敏是指人体对花粉过敏的病症。花粉是植物繁殖的一种物质，大多数植物都会产生花粉。当人体对花粉过敏时，人的免疫系统会误认为花粉是有害物质，于是会产生一系列的反应，包括咳嗽、流鼻涕
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