The energy analysis of agro-ecosystems from the view point of energy flow is a quantitative study on the function of agro-ecosystem, and is one of the most important aspects in agro-ecosystem study.
农业生态系统的能量分析从能流着手进行农业生态系统的功能量化分析，是农业生态系统重要的研究方法之一。
The exchange of commodities is the major cause for the output and input of energy and material between agro-ecosystems.
商品交换是造成农业生态系统间的能量和物质输出及输入的主要原因。
Mulberry-silkworm ecosystem is one of the important agro-ecosystems in China.
蚕桑生态系统是我国农业生态系统的重要组成部分。
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