A fever is a symptom of illness.
发烧是生病的症状。
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今天的几个句子是有关生病的：1. His sick father is in the hospital. 他生病的父亲正在住院治疗。2. Drink this, else you will be sick. 把这喝下去,否则你会生病的。3. His illness put a crimp in our plans. 他的生病妨碍了我们的计划。
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