根据去年发表的首份中国水资源普查公报显示，已有超过半数的河流在过去30年间干涸，大致70%的淡水被污染。
Morethan half of China 's 50,000 rivers have vanished over the past two decades , according to China 's first national census of water , published last year . About 70 % of its remaining fresh water is polluted .
中国水资源公报