The bee sting has left a swelling on my hand.
我手上蜜蜂叮

下
一

。
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But if the immune system incorrectly identifies an intruder or doesn't properly learn who's who in the first place, our bodies can overreact to harmless substances — like a life-threatening allergic reaction to a minor bee sting.
是,如果免疫系统错误地识别入侵者,或者没有正确地了解谁是谁,我们的身体可能会对无害的物质做出过

——就像对轻微的蜜蜂蜇伤做出危及生命的过敏
。