National Health Service (the public health service in Britain that provides medical treatment and is paid for by taxes)国民医疗服务体系(全写为 National Health Service,英国靠税收维持的公众医疗服务)
an NHS hospital国民医疗服务体系所辖的医院
I had the operation done on the NHS(= paid for by the NHS).我做这次手术是国民医疗服务体系资助的。