These have adapted to the environment by the development of long taproots that penetrate downward until they approach the assured water supply provided by groundwater.

这类植物通过生长出长长的主根来适应环境，这些主根可以向下渗透，直达地下水提供的充足水源。

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A traditional approach is to isolate a variable that is believed to solely influence either supply or demand.

传统的方法是将一个被认为是只影响需求或供应的变量孤立出来。

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But sometimes, making desalination part of the approach to water management may be the only way to ensure a steady supply of drinking water.

但是有时候把淡化作为水资源管理办法的一部分，也许是确保稳定供应饮用水的唯一办法。

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He says a growing number of American businesses have cut costs by taking a supply-chain approach.

FORBES: Magazine Article

Compare this supply-side approach to the Keynesian solution recommended by Reich that puts artificial job creation and demand-side government stimulus first.

FORBES: Let's Not Be Bamboozled By Robert Reich's Stuff

Note that this approach to increasing money supply indicates the Fed is focused on ensuring that money is allocated to where it can be productive and earn good returns, assuming, of course, that banks are back in the business of making prudent loans.

FORBES: The Fed Did Its Job, Now Washington Needs To Come Through With Fiscal Policy