Somepeoplearepessimistic(悲观的)whentheythinkaboutthefutur...
问题详情：Somepeoplearepessimistic(悲观的)whentheythinkaboutthefuture.Theysaythat,ahundredyearsfromnow,wewillhaveusedmostoftheearth'sresources.Wewillhavepollutedourseasbadly,andbeunabletoeatfishfromthe...