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observational sampling
observational selection
observation and description on external things
observation and imitation of character
observation control system
observation equation
observation error
observation function
observation likelihoods
observation measurements
observation method
observation network at seabed
observation of agrometeorological disasters
observation of crop developmental stages
observation of crop growth
observation of developmental stages of grass
observation of developmental stages of trees
observation of ground pressure
observation of livestock growth and development
observation of navigation obstruction
observation of reservoir sediment
observation of seismic response of structures
observation of slope stability
observation of surrounding rock structure
observation platform
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
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