Natural water resources that can be exploited in the earth are extremely limited.

地球上可供开采的天然水资源是十分有限的。

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The study on water resources carrying capacity that involves natural water resources system and social system is a very complex systemic problem.

水资源承载力研究涉及到自然水资源系统和社会系统的方方面面，是典型的复杂系统问题。

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The assessment results indicate there are quasi cycle motion law of natural water resources renewability of Jin river basin in the time scale in years.

评价结果表明：泾河流域水资源自然再生能力在年内时间尺度上存在明显的准周期运动规律。

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While large-scale desalination is not uncommon in those parts of the world where natural water resources are scarce -- such as Texas and Australia -- the UAE is by some margin, according to Iannelli, the industry's most active player.

CNN: Counting the carbon cost of bringing water to the desert

Then all these states will be fighting one another for natural resources and water.

CNN: ASIANOW - TIME Asia | Interview: Foreign Minister Win Aung - Page 1

Some of the world's poorest people are losing the land, water and natural resources that have supported their livelihoods for generations.

BBC: Analysis: Land grab or development opportunity?