The air we breathe, the water we drink and the soil that grows our food are part of a delicate global ecosystem that is increasingly under pressure from human activities.

我们呼吸的空气，饮用的水，生长食物的土壤，是全球脆弱生态系统的一部分，这一系统所承受的人类活动的压力日益加大。

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The results show that this ecosystem of artificial sea water, which is applicable to teaching and research sea animals in the laboratory, will be stable and balanced under the correct adjusting.

试验结果表明，这种人工海水生态系统在正确的调校下能达到稳定和平衡，适合于在实验室饲养供教学和科研的有关动物。

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"The majority of the ecosystem is under the water, " Whitehouse said.

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