纳微粉体
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micro and nano powders 微纳米固体
micro-and nano-powders
微观和纳米
以上为机器翻译结果，长、整句建议使用 人工翻译 。
However, they are usually synthesized as nano-sized or micro-sized powders, and this makes it very difficult to retrieve them from the mother liquors or the liquid-phase reaction systems [2, 3].
然而，他们常常是纳米或微米粉末，这使他们很难从母液或作用体系的液相中分离出来[2]。
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