Syntheses of low - molecular weight polyacrylic acid sodium with water as solvent and APS - SHS as REDOX initiator are studied.

以水为溶剂，过硫酸铵-亚硫酸氢钠氧化还原引发体系，研究了低分子质量聚丙烯酸钠的合成。

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The liquid contains no solvent, such as water, and can be charged electrically with no heat involved.

这种液体不含有任何溶剂，比如水，并且可以在没有热量参与的情况下充电。

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As water is a good solvent, pure water is never met with in nature.

因为水是一种很好的溶剂，所以在自然界从未遇见过纯水。

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