“If you cut down more trees than you grow, you run out of trees,” writes Gilding.“If you put additional nitrogen into a water system, you change the type and quantity of life that water can support.

“如果你砍倒的树比你种的还多，你就会将树用光，”基尔丁写道，“如果你将额外的氮投放进一个水系，你就会改变那个水体所能维持生命的种类和数量。

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A check that I do quite often is to ascertain the quantity of processors on the system. So, if I have purchased a dual processor quad-core server, I can run.

我经常做的检查是确定系统中处理器的数量。

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The only reason to carry out a test is to improve a process, to improve the quality and quantity of the next run or of next year's crop.

执行一项试验的唯一理由是改进过程，改进质量与下次的运作数量或是次年的收获。

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In theory, a discretionary central bank could limit the quantity of money and achieve long-run price stability by controlling the growth of nominal final demand.

FORBES: The Federal Reserve's Flawed Approach To Monetary Policy

Windows Phone 7 is a known quantity and requires a much lower specification of device to run.

FORBES: What's The Story Behind Windows Phone 7.8?

What Segal, Zelt and other Canadian officials underscore is that their government-run system is driven by the value of the care and that the quantity of tests and procedures don't necessarily equal quality.

CNN: Reality check: Canada's government health care system