求大神翻译：The world said to have about 3000 times as much underground water as water it has in rivers and lakes,and ground water is fair clean.
网友回答
据说世界上地下水的容量是河水和湖水水量的三千倍左右,而且地下水是非常干净的
======以下答案可供参考======
供参考答案1:
世界上据说有是淡水3000倍的地下水，
供参考答案2:
世界上，地下水是江河湖泊水量的3000倍，并且地下水很干净