The sol in the positive order was thin blue and the gelation time was shorter than the sol in the reverse order.

正加方式得到的溶胶淡蓝色透明，较反加方式下的溶胶的胶凝时间短。

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The sol in the positive order was thin blue and the gelation time was shorter than the sol in the reverse order.

正加方式得到的溶胶淡蓝色透明，较反加方式下的溶胶的胶凝时间短。

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