Proper increase of La ion exchange degree not only increased the stability of the framework structure but also the hydrothermal stability of acid sites.
镧离子也有稳定骨架的作用，更重要的是能提高酸中心的水热稳定性。
Abstract: the fusion hindrance in heavy-ion collisions is studied in the framework of the two-center liquid drop model.
摘要：利用双中心液滴模型，我们研究了重离子反应中的熔合阻止现象。
Abstract: the fusion hindrance in heavy-ion collisions is studied in the framework of the two-center liquid drop model.
摘要：利用双中心液滴模型，我们研究了重离子反应中的熔合阻止现象。
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