英语流利说 Level5 Unit3 Part2 Listening: The Circulatory System
TheCirculatorySystemAflowchart,likethisone,showshowaprocessbeginsandends,andthestepsinbetween.Theprocesscanbeofalmostanykind,frommanufacturingatiretocreatinganadvertisement.Therefore,learninghowtodesc