慢性过分反应免疫系统不会像过分敏感的免疫系统，虽然它也是一个坏东西。
Chronically over-reactive immune systems may not, though, be an entirely bad thing.
引起这些情况的原因在于过分敏感的免疫系统，它将这些无害的物质当作它要对付的病原体一样进行反应。
The cause in each case is an oversensitive immune system that is reacting to harmless materials as well as to the pathogens it is supposed to be fighting.
南茜自小有残疾，这养成她吃苦耐劳的精神，但也使她在很多情况下过分敏感。
Nancy has a childhood handicap, which gives her a hardy spirit, but also makes her overly sensitive in many situations.
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