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SEM was used to observe nucleation site of Co particles, and energy spectrum analysed phase composition of white matter in endosexine of mold. 借助掃描電鏡觀察到細化的葉片表面的鈷微粒形核核心,通過能譜分析手段,研究型殼內(nèi)表層的白色物質(zhì)的相組成。