The history and latest progress in preparation and application of mesocarbon microbeads (MCMB) is reviewed. Some key problems that need to be solved are discussed.
综述了中间相炭微球制备和应用的国内外研究现状，分析了现有工艺中存在的问题，提出了需要解决的几个关键问题。
The generation of high accuracy real-time pseudo-range data is one of the key problems that need to be solved in the development of navigation satellite signal simulator.
高精度伪距数据的实时生成是导航卫星信号模拟器开发需要解决的一项关键技术。
Stratigraphic distribution and groundwater quality are two key problems which need to be solved in the geophysical prospecting for groundwater in Ordos Cretaceous Basin.
从鄂尔多斯白垩系盆地地下水地球物理勘查特点出发，分析了该地区地球物理勘查所要解决的两大问题：①查明白垩系盆地地层分布特征；
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