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xu gen
Author(s): 
Pages: 77
Year: Issue:  4
Journal: Wisdom

Abstract: <正>参天大树,枝繁叶茂,靠的是阳光和养分,而养分的吸取靠的是扎根于地底下的须根,它们在泥土深处、砂砾缝中寻觅养分,汇集点点滴滴,供着棵棵参天大树,滋养片片绿茵。
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