drawn-out       
adjective [ before noun ] uk/ˌdrɔːnˈaʊt/ us/ˌdrɑːnˈaʊt/
 持续很久的;拖长的
lasting longer than is usual or necessary
  This dispute has been a long drawn-out affair. 此次争端旷日持久。 
 Synonyms: extendedlengthylong (TIME)prolongedprotracted