A fever is a symptom of illness.发烧是生病的症状

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.I feared you were ill. 我害怕你生病了。