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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Pressure-treated fir walls must be properly constructed to prevent contact with soil and water.

压力处理的杉木墙必须妥善建造以防止土壤和水接触。

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Excess pore water pressure in soil increases with the increasing of excitations.

随振动激励次数的增加，土中超孔隙水压力增大；

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In Houston last summer, there were 700 water main breaks every day due to aging pipes and pressure from increased water use and dry soil.

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High demand for water amid the heat wave and problems with soil shrinking as the ground warms has resulted in burst pipes and low water pressure in Oklahoma City, prompting officials to issue mandatory water-use restrictions for the first time in at least a decade, according to utilities department spokeswoman Debbie Ragan.

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