Somepeoplearepessimistic(悲觀的)whentheythinkaboutthefutur...
問題詳情：Somepeoplearepessimistic(悲觀的)whentheythinkaboutthefuture.Theysaythat,ahundredyearsfromnow,wewillhaveusedmostoftheearth'sresources.Wewillhavepollutedourseasbadly,andbeunabletoeatfishfromthe...