最后，现有的规则中没有一个可以解决如何为SOA启用现有的应用程序的问题；大部分时间都采用自顶向下流程。
Finally, none of the existing disciplines address how existing applications can be enabled for SOA; a top-down process is employed most of the time.
待处理的废水在中心向下流动，借助于微生物产生气体所部分产生的流动，该废水再次沿载体组件(40)向上。
The wastewater to be treated flows downwards in the centre and returns upwards along the support elements (40), the current being partially generated by gas evolution from the micro-organisms.
待处理的废水在中心向下流动，借助于微生物产生气体所部分产生的流动，该废水再次沿载体组件(40)向上。
The wastewater to be treated flows downwards in the centre and returns upwards along the support elements (40), the current being partially generated by gas evolution from the micro-organisms.
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