烟雾等无定形物质的模拟一直是计算机图形学领域一个具有挑战性的问题，烟雾的实时模拟更是一个困难的问题。
The simulation of gaseous phenomena such as smokes is a challenging problem in computer graphics. Real-time simulation of smokes is particularly difficult.
但由于孔壁是无定形结构，酸性较弱和水热稳定性较差，使其在催化领域的应用受到很大限制。
However, its application to petrochemical industry is limited due to the amorphous character of mesopore wall and weak acidity, as well as poor hydrothermal stability.
但由于孔壁是无定形结构，酸性较弱和水热稳定性较差，使其在催化领域的应用受到很大限制。
However, its application to petrochemical industry is limited due to the amorphous character of mesopore wall and weak acidity, as well as poor hydrothermal stability.
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