Every year, 5,000 people have life-threatening reactions to anaesthetics.

每年，有5000人会对麻醉剂产生致命的不良反应。

《柯林斯英汉双解大词典》

Fire ants get their name because when they sting they inject poison into the skin that causes of a feeling of intense burning. Some people suffer life-threatening reactions.

红蚁名字的由来是因为它们叮人的时候会注射一种毒素到人的皮肤里，致使产生强烈的灼烧感，一些人甚至有产生一些危及生命的反应。

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"This is the first study of the neurological reactions to human touch in a threatening situation." said Dr. Coan.

可恩博士说：“这一研究首次对人在受到威胁的情况下进行身体接触所产生的神经学反应进行了探究。”

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Granted, for people with life-threatening reactions, such studies may be unethical, as they would involve having one group of participants eating known allergens.

CNN: Food allergy diagnosis 'an inexact science'

Olive doesn't fancy the idea of eating a steak with an epinephrine auto-injector, which treats life-threatening allergic reactions.

CNN: Ticks causing mysterious meat allergy

Some reactions can be life threatening.

FORBES: Gesundheit!