沼气发酵系统是复合农业生态系统中物质循环和能量转化的枢纽。
Biogas system is the pivot in material recycling and energy transformation of a complex agro-ecosystem.
土壤酶是一类稳定的蛋白质，参与了土壤中的生物化学反应，对土壤生态系统中物质的循环转化有重要的作用。
Soil enzymes are stable proteins that catalyze biochemical reactions and play important roles in circulation and conversion of materials in soil.
土壤动物是生态系统中特殊的组成部分，在生态系统的物质循环和能量转化过程中起着重要的作用。
Soil animals are special composition in ecosystem that play an important role in the substance circulation and energy transform.
作为生态系统重要组成部分的土壤微生物，参与土壤中复杂有机物质的分解和再合成，促进C、N、S、P等的循环。
As an important component of the ecosystem of the soil microbes, involved in the complex of soil organic matter decomposition and re-synthesis, the promotion of c, n, s, p, etc. cycle.
土壤动物作为城市生态系统中特殊的组成部分，在生态系统的物质循环和能量转换中起着重要的作用。
Soil animals are special community in ecosystem which play an important role in the substance circulation and energy transform.
土壤动物作为城市生态系统中特殊的组成部分，在生态系统的物质循环和能量转换中起着重要的作用。
Soil animals are special community in ecosystem which play an important role in the substance circulation and energy transform.
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