A chronic illness or disability lasts for a very long time.
例句
...chronic back pain.慢性背痛
ADJ
难以根除的;积习难改的
You can describe someone's bad habits or behaviour as chronic when they have behaved like that for a long time and do not seem to be able to stop themselves.
例句
Anyone who does not believe that smoking is an addiction has never been a chronic smoker.不相信抽烟能上瘾的人肯定不是老烟民。...a chronic worrier.总是忧心忡忡的人
ADJ
(局势或问题)严重的,顽固的
A chronic situation or problem is very severe and unpleasant.
例句
One cause of the artist's suicide seems to have been chronic poverty...那位艺术家自杀的一个原因似乎是极端贫困。There is a chronic shortage of patrol cars in this police district.这个治安辖区严重缺乏巡逻车辆。
英英词典释义
Adverb
1. in a habitual and long-standing manner;
"smoking chronically"
2. in a slowly developing and long lasting manner;