Keto-enol tautomerism is the most common tautomery phenomenon.Keto -enol themselves are the real chemical substance.
酮及烯醇互变是互变作用最普通的现象,它们都是真实的化学实体。
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(原版) If you're a healthy older child or adult, watch out for sudden dizziness, severe, persistent vomiting, difficulty breathing, pain or pressure in the chest or abdomen, and flu-like symptoms that improve, then return with a fever or worse cough.
如果你是一个健康
大孩子或是成年人,要当心出
突然头晕,严重,且持续
呕吐,呼吸困难,胸腹闷痛
症状,这些疑似流感
症状会恶化,继而出
发烧或是严重咳嗽

。