ThispapermainlydiscussedthelongsentencesinscienceandtechnologyEnglish,includingthecategorizationandanalysisofthelongsentencesandtheirfunctionandrole,aswellasthetranslationstrategy/tactic.Thepaperanylyzedthelanguagecharactersoflongsentencesindifferentcategoriesbasedonalargenumberofexamples.Adetailedanalysisandtranslationarealsofollowedaftereachexample.