DuPont's second-quarter earnings rebounded from a loss the year before, and the chemical giant said it expected "substantial" improvement in the second half of the year.

杜邦公司今年第二季度的收入已摆脱去年的亏损，这个化工巨人表示他们预计今年下半年将有重大改进。

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Its improvement range depends on the polarity and chemical structure of the coupling agents.

其提高的幅度大小与偶联剂的极性及化学结构有关。

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Explanation was given on improvement effect of heating rate to caking property from essence of chemical reaction using pyrolysis kinetics.

并用热解动力学从化学反应的本质解释了升温速率对煤的粘结性的改善作用。

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Shah said he continues to see modest improvement in 2013 in the market for metalorganic chemical vapour deposition equipment, which is used to manufacture LED lighting.

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