从图书馆的知识服务出发，来研究数字媒体的知识管理机制。
The knowledge from the library services starting to study digital media knowledge management mechanism.
临床研究需要严格的质量保证和道德风险管理机制。
Clinical study needs the strict management system towards quality guarantee and moral risks.
然后详细研究了变更信息的管理机制。
Next, we describe in detail the Change Information Management Mechanism.
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