However, it is very difficult to design and scale up this kind of reactor, in that the present study has focused on the transient characteristics of the inherent gas-liquid flow increasingly.
鼓泡反应器是工业生产中应用较为广泛的一类反应器，但由于其设计与放大困难，因此对其内部气液两相瞬态流动特性的考察日益成为研究的热点。
New features have come up in changes of practical demand for tourism planning and design with full scale competition and further research in tourism industry.
随着旅游业竞争态势的全面展开，旅游规划工作的不断深入，旅游规划的现实需求也相应出现了新的变化。
Crystallization kinetics are the basis for crystallization behavior and crystallizer scale-up design.
结晶动力学是结晶操作和结晶器设计与放大的基础。
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