【中文版】

恩格尔系数是指食品支出总额占个人消费支出总额的比重。这个概念是由经济学家恩斯特·恩格尔提出的，因此以他的名字命名。

恩格尔系数是衡量一个国家或地区经济发展水平的重要指标之一。一般来说，随着国家或地区的经济发展，居民的食品支出占总消费支出的比重会逐渐降低，而用于住房、教育、医疗等方面的支出会逐渐增加。因此，恩格尔系数越低，说明该国家或地区的经济发展水平越高。

在我国，恩格尔系数也是衡量居民生活水平的一个重要指标。一般来说，城镇居民的恩格尔系数较低，农村居民的恩格尔系数较高。但是随着农村居民收入水平的提高和城镇化进程的加快，农村居民的恩格尔系数也在逐渐降低。

总的来说，恩格尔系数是一个反映居民生活水平和经济发展状况的重要指标，通过了解恩格尔系数，我们可以更好地了解一个国家或地区的经济发展状况和居民的生活水平。

【英文版】

The Engel coefficient refers to the proportion of total food expenditure to total consumer expenditure. This concept was proposed by the economist Ernst Engel and is named after him.

The Engel coefficient is an important indicator for measuring the level of economic development of a country or region. Generally speaking, as the economy of a country or region develops, the proportion of residents' food expenditure in total consumption expenditure gradually decreases, while expenditure on housing, education, medical care and other aspects gradually increases. Therefore, the lower the Engel coefficient, the higher the level of economic development of the country or region.

In China, the Engel coefficient is also an important indicator for measuring the living standards of residents. Generally speaking, urban residents have a lower Engel coefficient, while rural residents have a higher Engel coefficient. However, with the increase of rural residents' income levels and the acceleration of urbanization, the Engel coefficient of rural residents is also gradually decreasing.

Overall, the Engel coefficient is an important indicator reflecting the living standards of residents and the level of economic development. By understanding the Engel coefficient, we can better understand the economic development of a country or region and the living standards of residents.