点击下载：华南农业大学：《农业生态学》课程教学课件（讲稿）Chapter 13 Nutrient Cycling and Pollution
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Energy and Matter Energy Abiotic (as light) matter Matter cycles from non living to living Biotic Energy matter (mostly heat) emanates into space5 Energy and Matter
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点击下载：华南农业大学：《农业生态学》课程教学课件（讲稿）Chapter 13 Nutrient Cycling and Pollution
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