中文：

M2是广义货币供应量，是经济学中的一个重要指标，它反映了一个国家或地区的货币流通情况。M2主要由现金、银行活期存款、短期定期存款、市场资金等组成。

M2作为一个宏观经济指标，对于分析和预测经济走势具有重要意义。通常情况下，M2增长越快，说明货币供应量越多，经济增长也会相应加快。反之，如果M2增长缓慢，则说明货币供应量不足，经济增长也会受到制约。

在我国，M2主要由中央银行和商业银行共同控制。中央银行通过调整存款准备金率、利率等货币政策工具来控制M2的增长速度。商业银行则通过吸收存款、发放贷款等经营活动来影响M2的规模。

此外，M2还是中央银行制定货币政策的重要依据之一。中央银行可以根据M2的增长情况来决定是否需要调整货币政策，以保持经济的稳定增长。

总的来说，M2是反映一个国家或地区经济运行状况的重要指标之一，对于分析和预测经济走势具有重要意义。

英文：

M2 is the broad money supply, which is an important indicator in economics. It reflects the monetary circulation of a country or region. M2 is mainly composed of cash, bank demand deposits, short-term time deposits, market funds, etc.

As a macroeconomic indicator, M2 is of great significance for analyzing and forecasting economic trends. Usually, the faster the growth of M2 is, the more the monetary supply is, and the economic growth will also increase correspondingly. Conversely, if the growth of M2 is slow, it indicates that the monetary supply is insufficient, and economic growth will be restricted.

In China, M2 is mainly controlled by the central bank and commercial banks. The central bank adjusts monetary policy tools such as deposit reserve ratio and interest rates to control the growth rate of M2. Commercial banks affect the size of M2 through activities such as absorbing deposits and making loans.

In addition, M2 is also one of the important bases for the central bank to formulate monetary policy. The central bank can decide whether to adjust monetary policy based on the growth of M2 to maintain stable economic growth.

Overall, M2 is an important indicator reflecting the economic operating conditions of a country or region, which is of great significance for analyzing and forecasting economic trends.