In the meantime we tried other additive chemicals, such as DMSO, glycerin, formamide. They were no notable results in long PCR.

同时，我们发现其它的添加物，如DMSO，甘油，甲酰胺对长片段pcr的作用不明显。

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Benzene is mostly used as an additive to other chemicals.

苯，大多用作其他化学品的添加剂。

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Based on requirements of cementing job in Jilin oilfield, Chemicals Corporation Limited in Weihui City of Henan Province made adjustment on G203, its original low density early strength additive.

针对吉林油田固井设计施工需要，河南省卫辉市化工有限公司对原有的G203进行了调整。

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This problem is compounded by the possible presence of multiple chemicals which together have an additive effect that greatly increases the lethal action of any single chemical.

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