因為沒有了紙張，信息傳播比較慢，寫信也沒辦法寫。可能馬拉松成了學校必考項目之一，時間一長，人類的體質明顯增強，物種得到優化。

熱心網友

因為沒有了紙張，信息傳播比較慢，寫信也沒辦法寫。No paper,message delay too much,and no letter for communicating.可能馬拉松成了學校必考項目之一，時間一長，人類的體質明顯增強，物種得到優化。paharps Marathon is becoming one of the key subject for exams at schools, so peoples should become stronger for along time.More strong for mankind in the future.

熱心網友

Because without paper, information dissemination is slower, can not write either while writing letter. Perhaps the marathon has become the school and must take an exam of one of the projects , as time goes by, the human physique is obviously strengthened, the species is optimized.