求翻译：在中国，开发物流的研究，探索物流的规律，提高物流科学化、合理化和现代化水平，已经作为经济社会发展中的重大理论和实践课题提到了非常高的议事日程；是什么意思？

In China, the development of the logistics of the study, to explore the logistics of the law, improve logistics and scientific rationalization and modernization, as the economic and social development has been the major theoretical and practical issues that a very high on the agenda;

In China, the development of logistics research and exploration logistics of scientific laws, and improved logistics, rationalization and modernization level as in the process of economic and social development, has been the major theoretical and practical issues referred to a very high level of the

In China, the development physical distribution research, the exploration physical distribution rule, enhances the physical distribution scientific style, the rationalization and the modernized level, already took the economic society developed the significant theory and the practice topic mentioned

In China, research on the development of logistics, explore the logistics of law, raising the level of scientific, rationalization and modernization of logistics, has already been used as the major theoretical and practical issues in the economic and social development referred to the agenda is very