求翻译这段话“Ihaveexplainedthistoyouseveraltimesalready,”saidtheteacher.“Ihopeyouhaveunderstooditnow.”Thenhelookedatalittleboyatthebackoftheclass.HaveyoubeenisteningJones?”heasked.“Hereisasimplep

　　求翻译这段话

　　“Ihaveexplainedthistoyouseveraltimesalready,”saidtheteacher.“Ihopeyouhaveunderstooditnow.”Thenhelookedatalittleboyatthebackoftheclass.HaveyoubeenisteningJones?”heasked.“Hereisasimpleproblem:"Sallyhas_workedinanofficeforthirty-fourweeks.Inthattime,shehasearned300poundsaweek.Howmuchhassheearnsofar?"

　　"Please,sir."Jonesanswered,"Icanonlyansweryourfirstquestion.Ihavenotbeenlistening