We must constantly adjust the amount of money in circulation.

我们必须对货币的流通不断进行调节。

《新英汉大辞典》

S. Federal Reserve increases the amount of money in circulation in the coming weeks to stimulate the American economy.

如果美联储在接下来的几个星期增加货币流通量以刺激美国经济，中国面临的局势将更加艰难。

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The problem could worsen if the U.S. Federal Reserve increases the amount of money in circulation in the coming weeks to stimulate the American economy.

如果美联储在接下来的几个星期增加货币流通量以刺激美国经济，中国面临的局势将更加艰难。

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Economists use this measurement when they are trying to quantify the amount of money in circulation.

FORBES: INTERVIEW: Inflation Should Not Be A Problem For U.S., Canada, Gold Prices To Rise -- Dundee's Murenbeeld

Economists use this category when looking to quantify the amount of money in circulation and trying to explain different economic monetary conditions.

FORBES: INTERVIEW: Inflation Should Not Be A Problem For U.S., Canada, Gold Prices To Rise -- Dundee's Murenbeeld

One says that, over the long run, the price of gold approximates the total amount of money in circulation divided by the size of the gold stock.

NEWYORKER: Mastering the Machine