生态系统是生物群落与它的无机环境相互作用形成的统一整体生物圈这个最大的生态系统中还可以分出很多个生态系统例如一片森林一块草地一个池塘 Template




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tomski生态系统是生物群落与它的无机环境相互作用形成的统一整体生物圈这个最大的生态系统中还可以分出很多个生态系统例如一片森林一块草地一个池塘 coloring