illness的复数：illnesses

n.(身体或精神上的)疾病，病;(某种)病;患病期

例句：

Sarah had been plagued continually by a series of minor illnesses

萨拉一直小病缠身。

We now know that repressing anger is a contributory factor in many physical illnesses.

现在我们知道压制自己的愤怒是导致许多身体疾病的因素之一。

They are already battling to eradicate illnesses such as malaria and tetanus

他们已经在努力消灭疟疾、破伤风等疾病。

Accidents and sudden illnesses are no respecters of age.

不管什么年龄都有可能遭遇意外事故和突发疾病。