/ˈkrɒnɪk/
(especially of a disease 尤指疾病) lasting for a long time; difficult to cure or get rid of 长期的；慢性的；难以治愈（或根除）的
chronic bronchitis/arthritis/asthma
慢性支气管炎／关节炎／哮喘
the country’s chronic unemployment problem
该国长期存在的失业问题
a chronic shortage of housing in rural areas
农村地区住房的长期匮乏