right now, a billion people are chronically hungry.
2017年6月六級真題（第二套）聽力 Section C
When Liu, the UCLA sleep researcher and professor of medicine, brought chronically sleep-restricted people into the lab for a weekend of sleep during which they logged about 10 hours per night, they showed improvements in the ability of insulin to process
2015年12月六級真題（第二套）閱讀 Section A
柯林斯高階英漢雙解學習詞典釋義
ADJ
(疾病、殘疾)慢性的，長期的
A chronic illness or disability lasts for a very long time.
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.