求翻译：21世纪水资源正在变成一种宝贵的稀缺资源，水资源问题已不仅仅是资源问题，更成为关系到国家经济、社会可持续发展和长治久安的重大战略问题。 本世纪以来，随着人口膨胀与工农业生产规模的迅速扩大，全球淡水用量飞快增长。从1900－1975年，世界农业用水量增加了7倍，工业用水量增加了20倍，并且近几十年来，用水量正以每年4%－8%的速度持续增加，淡水供需矛盾日益突出。是什么意思？

21st century water scarcity is becoming a precious resource, water issues have more than just resources, but also as related to national economic and social sustainable development and long-term stability of major strategic issues. In this century, with population growth and rapid expansion of indus

Century 21 water resources is becoming a valuable scarce resources, water resource issues have not only become a problem of resources, but more is linked to the national economic and social sustainable development and long-term stability of major strategic issues. Since the beginning of the century,

The 21st century water resources are turning one precious scarce resources, the water resources question already are not merely the resources question, becomes relates the state economy, the social sustainable development and the long-term peace and goo

Scarcity of water resources in the 21st century is becoming a valuable resource, water resources questions have resources, but as related to the sustainable development of the economic, social and long-term stability of the major strategic issues. Since the beginning of this century, as the populati