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生态循环
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生态循环
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生态循环
在生态系统中,物质从环境开始,经生产者、消费者和分解者,最后回到环境中去,完成一个从简单无机物到有机复合物,最终又回到简单无机物的过程。
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product availability assessment
product baseline
product brand
product bundle
product category
product category theory
product chain complex
product channel
product cipher
product class
Product Classification for Statistics
product code
product competitive intelligence
product-complete category
product complex
product configuration
product contact surface
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product cycle
product data exchange
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product data management, PDM
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Product Design
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