Polution expansion leads to the increasing demand for fixed air, water and land. It naturally follows that more and more people long for high living standard.
人口的增长导致对世界上固定的空气、水、土地的需求不断增长。与人口增长相伴的是越来越多的人渴望着更高的生活水平。
Save the using of water, forbid the waste of water resource. Make the use of science technology to reduce the polution and protect the water …
节约用水，根绝糜费水资本应用科学手艺，削减污染，维护水资…
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