顽疾的英文：
recurring illness; chronic disease
Work is the grand cure of all the maladies and miseries that ever beset mankind.
工作是医治人类所有顽疾和厄运的最有效的办法。——卡莱尔
adj. 循环的；再发的
v. [recur] 的现在分词形式；返回
For our own country, it has been a time for recurring trial.
就我们国家而言，它经过了一个反复考验的时期。
The checkered pattern of that suspender recurred incessantly to his mind
那根背带的棋盘格花纹不停地在他脑子里显现出来。
A skin condition characterized by the development of recurring boils
疖病特征为经常出现疖子的一种皮肤状况
n. 疾病
Many people are immobilized by the illness.
许多患上这种病的人都瘫痪了。
It becomes ill you to do so.
你这样做是挺不合适的。
They bear you no ill will.
他们对你并无恶意。
adj. （病）慢性的；（人）久病的；长期的，不断的；惯常的，习惯性的
My brother has chronic bronchitis.
我的哥哥患有慢性支气管炎。
There is a chronic unemployment problem in America.
在美国存在长期失业问题。
A chronic, whining complainer.
发牢骚的人老是嘀嘀咕咕抱怨的人