illness
单词辨析：
指人类与动物的疾病或植物病害，多用于指具体的、感染所致的疾病。
contagious diseases
传染病
He suffered from a stomach disease.
他有胃病。
通常指抽象的疾病，多指身体不适的时间或状态，但不用来指感冒、头疼之类的小病。
You have to ask for leave if you take off work due to illness.
如果你因病没去上班，你得请假。
His grandfather is recovering from a short illness.
他祖父不久前生病，目前正在逐渐康复。
指身体某部位出现的健康问题。
He has trouble with his left shoulder.
他左侧肩膀有问题。
He suffers from back troubles.
他有背疾。
相关例句：
Just as I started to think that I was never going to get well, the illness began to recede
正当我开始觉得自己永远都好不了了的时候，我的病开始好转了。
The doctor diagnosed the illness as pneumonia.
医生诊断这病为肺炎。
Her eyes were sunken after her illness.
她病了一场，眼睛都眍进去了。
He died after a brave but unavailing fight against a terminal illness.
在与绝症进行了一番勇敢但却徒劳的抗争之后，他还是去世了。
His illness is being aggravated by anxieties.
忧虑使他的病情加剧了。
His illness has taken a turn for the better.
他的病有了好转。