Water is an important part of ecological enviroment, and is an indispensable substance to life and productive activities of man.

水是生态环境的重要组成部分，水是人类生活和生产活动中不可缺少的物质。

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Understanding of the relationship between man and the target world has impact on both man's subsistence and efficient, sound circulation of ecological system.

人与对象世界关系的把握直接关系到人类的生存，同时也关系到生态系统的有效与合理的循环。

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The main reason for the ecological crisis is that man can't do well with nature.

因为造成生态危机的主要原因是人们不能善待自然。

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And perhaps even these become impossible to preserve due to the accelerating pace of man-made ecological changes.

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In coordination with the Regional Bureau for Sciences in Nairobi and the Man and Biosphere (MAB) Secretariat at Headquarters, implement the ecological sciences programme, including support to the World Network of Biosphere Reserves through assistance to the cluster countries for the application of the Seville strategy and Madrid Plan of Action.

UNESCO: Criteria & Requirements