Changes in the money supply affect the level of economic activity and the interest rate.

货币供给的变化影响经济活动水平和利率。

《柯林斯英汉双解大词典》

Although economists say the United States is not technically in a recession, the slowdown in economic activity is having a dramatic impact on the amount of money immigrants are able to send back home.

尽管经济学家认为，严格地说，美国现在并不能算是陷入了经济衰退，可是经济活动减速所造成的负面影响随处可见，而且外国民工首当其冲，这从他们给家里汇款的数量上可见一斑。

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In the macroeconomy more generally, by reducing spending and economic activity, tighter money raises the risks of unemployment or bankruptcy faced by individual households or firms.

在更广泛的宏观经济中，通过削减开支、减少经济活动，银根的进一步紧缩将会增加个人失业和公司破产的风险。

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This is our old friend, "helicopter money", which Wadhwani believes could help boost economic activity without causing serious problems for inflation. (In fact, he first proposed this with another economist Michael Dicks in 2011).

BBC: On markets and helicopters