The importance of picture archiving and communication system is expatiated in this article based on practical need in hospital and the actual status in China.
本文阐述了一个符合中国国情和医院实际需要的PACS系统的重要性，介绍了我院影像科PACS系统架构及运行情况。
This article, based on the practical need of English teaching, emphatically probes into the principle and method of English cultural teaching.
本文从英语教学的实际需要出发，着重探讨了在英语文化教学中所应遵循的原则和方法。
Next, based on PID control's structure, the need of practical control engineering and the realizable conditions, it is analyzed that PID control's special advantages and the theoretical argument.
接下来，从PID控制的结构形式、实际控制工程需求和实现条件分析了PID控制的独特优点和理论依据。
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