COOH and -SH two polar groups in mercaptoacetic sodium acid have properties of strong reaction to sulphide ores. It is the most satisfactory agent for replacing sodium cyanide to suppress impurities.

巯基乙酸钠中两个极性基团一COOH及—SH具有同硫化矿强烈反应的特性，是代替氰化钠抑杂的理想药剂。

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How are women the same and how are they different in two polar opposite places?

在两极相对的地区的女性有怎样的相似和差异？

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Two polar bears SPAR in the snow as a magenta sunset descends over Churchill, Manitoba, Canada.

品红色的暮光降临到加拿大曼尼·托巴省的丘吉尔小镇，两只北极熊正在雪中打闹。

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Sitting in the middle of these two polar opposites is the more urgent compressed time factor.

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At the very root of what captivates our emotional mind are two polar opposite constructs: fear and pleasure.

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His aesthetic is that of darkness and beauty, mixing two such polar elements with macabre elegance.

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