At that time in Afghanistan, the principle of a chain of command was often ignored.
当时在阿富汗，一个指挥系统原则常常被忽视。
The principle, method and application of Polymerase Chain Reaction (PCR) was introduced in this paper.
介绍了分子生物学前沿技术聚合酶链式反应(PCR)的原理、方法及应用。
As a new management principle, supply chain management has been widely valued.
供应链管理作为一种新型的管理理念，已受到了广泛的重视。
Finally, we discuss the design of emergency supply chain management system; especially introduce the principle of system design and organization frame.
最后探讨了应急供应链管理系统的设计，重点介绍了系统设计原则和结构体系。
Finally, we discuss the design of emergency supply chain management system; especially introduce the principle of system design and organization frame.
最后探讨了应急供应链管理系统的设计，重点介绍了系统设计原则和结构体系。
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