People who suffer from year-round hay fever (perennial rhinitis) may be allergic to persistent allergens in the environment coming from such sources as dust mites, mice, and cockroaches.
那些常年经历着过敏的人其过敏源可能是来自环境中的粉尘,老鼠,和蟑螂。
People who suffer from year-round hay fever (perennial rhinitis) may be allergic to persistent allergens in the environment coming from such sources as dust mites, mice, and cockroaches.
那些常年经历着过敏的人其过敏源可能是来自环境中的粉尘,老鼠,和蟑螂。
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