- 问题详情:Somepeoplearepessimistic(悲观的)whentheythinkaboutthefuture.Theysaythat,ahundredyearsfromnow,wewillhaveusedmostoftheearth'sresources.Wewillhavepollutedourseasbadly,andbeunabletoeatfishfromthem.Wewillhavemadetheairsodirtythatwewillneedtowearm...
- 13150