Astronomers o are involved in the observation, analysis and research of various astronomical phenomena, such as the movements of celestial bodies like moons, planets, stars and galaxies.
天文学家的工作涉及到观察、分析以及研究各种各样的天文现象，比如月亮、行星、恒星、银河等天体的运动。
According to the analysis, the development trend of extraction apparatus was predicted, and it provided some references for the research o...
通过上述分析，预测萃取设备的发展趋势，为新型设备的研发提供参考。
In this paper, the main research work on the application of NMR to the analysis of the structures and composition of heavy o...
本文概述了近年来核磁共振技术在重油结构和组成分析方面所做的主要研究。
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