最新第4版Theprogressionof3yearsbetween1stand2nd,6between2ndand3rd,and10between3rdand4thisareflectionnotsomuchofthelengthoftimeittakesforeachnewedition(whichhasindeedsteadilyincreased),butratherhowlongittakesustoforgetallthestressandpaininvolvedinmakinganewedition.Asadatap