Zinc alloy coatings can be obtained from suitable range of bath, and it has attracted a great attention due to their unique high corrosion resistance, low hydrogen brittleness and chemical stability.

锌合金镀层可以在适宜的镀液中比较容易的沉积出来，它具有优异的耐蚀性、低氢脆性和化学稳定性，已引起人们的极大关注。

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The stability of the pressure drop of the cigarette has great impact not only on the physical index and chemical index of the cigarette , but also on the sensory quality of cigarette.

卷烟的吸阻稳定性不仅对卷烟的烟气化学的稳定性有重要的影响，同时对卷烟的感官质量也是影响巨大。

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However, due to the chemical stability of propane and the activity of acrolein, this reaction required a multiple functional catalyst and no great progress was made in this field.

但由于丙烷的稳定性和丙烯醛的活泼性，该反应对催化剂的要求苛刻，有关的研究并未取得重大的突破。

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