求翻译：本文通过分析最近20年来中国统计年鉴有关农业的数据，计算分析影响粮食生产各因素的变动情况，系统的描述了最近几年粮食生产状况是什么意思？

By analyzing the data of the China Statistical Yearbook on agriculture in the last 20 years, Calculation and Analysis of changes in food production, the system description of the food production situation in recent years

This article analyzes the recent 20 years China Statistical Yearbook, the data relating to the agricultural impact analysis of the factors of food production, changes in the system described in recent years food production in

This article through the analysis recent for 20 year China statistics yearbook related agriculture data, the computation analysis influence grain produced various factors the change situation, the system description recent several year grain production condition

This article through an analysis of the last 20 years, China Statistical Yearbook data on agriculture, changes in the calculation and analysis of influence factors of grain production, description of the system in recent years, food production

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