这两个概念是有区别的：收入指的是一个国家或者一个家庭一年内所获得的资本流量；而财富指的是在除去负债以后，到目前为止，个体在一生之中所积累的财产存量。
The two concepts are different: income is the flow of money a nation or household receives in a year; wealth is the stock of assets it has accumulated over its life so far, minus its debts.
货币交易概念在美联储的货币存量统计中以M1表示。
This transactions concept of money is the one designated as M1 in the Federal Reserve's money stock statistics.
提出了有效床存量的概念、床压控制的原则、一次风机压头选择的依据。
The concept of effective bed inventory, the principle of bed inventory control and the selection theory of primary fan pressure are suggested.
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