1.designfeatures:refertothedefiningpropertiesofhumanlanguagethattellthedifferencebetweenhumanlanguageandanysystemofanimalcommunication.Theyarefeaturesthatdefineourhumanlanguages,suchasarbitrariness,duality,creativity,displacement,culturaltransmission,etc.2.function:theuseoflanguagetocommunicate,tothink,etc.Languagefunctionsincludeinformativefunction,interpersonalfunction,performativefunction,em...