细化过程还可以逐级下放，直到最终达到用户为止。
The refinement process can continue for any number of levels, until it finally reaches users.
您已经了解了在进行面向服务的分析期间，IT 满足业务需求的过程，您沿着抽象级别路径逐级向下，对设计进行进一步细化。
You saw where IT meets the business needs during service-oriented analysis and moved down the abstraction level path to further detail the design.
介绍了两种渗透汽化膜分离过程工艺及膜的分离性能，提出了连续渗透汽化逐级级联计算，并对中试装置的运行结果进行了验算；
The separation properties of the membrane and two different pervaporation processes were introduced. The continuous flow pervaporation process was designed and demonstrated.
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