中文：

产出增长率是指一个经济体在一定时期内产出的增长率，通常用百分比来表示。它是衡量一个国家或地区经济增长的重要指标之一，也是宏观经济分析中的重要指标。

产出增长率可以通过计算总产出值的变化量除以基期总产出值来计算。如果产出增长率较高，说明该国家或地区的经济增长较快，反之则较慢。

产出增长率的变化受到多种因素的影响，包括生产要素的投入、技术进步、市场供求关系等等。这些因素的变化会导致产出的变化，从而影响产出增长率。

在经济分析中，产出增长率通常被用来比较不同国家或地区的经济增长速度和趋势。通过对不同时期产出增长率的比较和分析，可以了解一个国家或地区的经济发展状况和趋势，为政策制定者和企业决策者提供重要的参考依据。

英文：What is the output growth rate?

Output growth rate refers to the growth rate of an economy's output in a certain period of time, usually expressed as a percentage. It is one of the important indicators to measure the economic growth of a country or region, and also an important indicator in macroeconomic analysis.

The output growth rate can be calculated by dividing the change in total output value by the base period total output value. If the output growth rate is high, it means that the country or region's economic growth is fast, and vice versa.

The change of output growth rate is affected by various factors, including the input of production factors, technological progress, market supply and demand, etc. These factors will cause changes in output, thus affecting the output growth rate.

In economic analysis, the output growth rate is usually used to compare the speed and trend of economic growth between different countries or regions. By comparing and analyzing the output growth rates in different periods, we can understand the development status and trend of a country or region's economy, providing important reference for policy makers and enterprise decision makers.