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ecosystem research Study of the ways in which plants, animals, and microbes interact with each other and with their physical environment and of the processes involving the circulation, transformation and accumulation of both matter, especially nutrient materials, and energy
environ.	生态系统研究 (探讨植物、动物、微生物彼此间的交互作用以及它与物理环境互动的方式，并探讨物质(尤其是营养物质)与能量间的循环、转换以及累积的过程。)

ecosystem research: 5 phrases in 3 subjects

Earth sciences	3
Electronics	1
United Nations	1