[uncountable]the range or quality of information that is included in a book or course of study, on television, etc.（书、课程学习、电视等的）信息范围，信息质量
magazines with extensive coverage of diet and health topics包含大量饮食与健康话题的杂志
The book gives good, general coverage of the subject.这本书很好地概括了该主题。
The volume offers incomplete coverage of the history of philosophy.该卷未能完整涵盖哲学史。
[uncountable, countable, usually singular]the amount of something that something provides; the extent to which something covers an area or a group of people提供的数量；覆盖范围
Immunization coverage against fatal diseases has increased to 99 per cent in some countries.在一些国家，针对致命疾病的免疫覆盖率已提高到99％。
The service has a coverage of 90 per cent of the UK population.该服务覆盖了英国90％的人口。
(North American English)
(British Englishcover)
[uncountable]protection that an insurance company provides by promising to pay you money if a particular event happens（保险公司的）保险
insurance coverage保险范围
Medicaid health coverage for low-income families对低收入家庭的医疗保险
Extra Examples
People fear losing coverage if they switch employers.人们担心换了雇主会失去保险。
the possibility of expanding health-care coverage to all将医疗保险扩大至全体的可能性