“Cross-sectional study”的概念、定义、翻译、参考文献-科学参考

单词	Cross-sectional study
释义	Cross-sectional study Encyclopedia 医学流行病学研究的统计学设计释 Cross-sectional study横断面研究统计学设计用来估计目标人群在某一时刻感兴趣变量（数量）分布的研究。即在某一时刻对抽样样本的每个受试对象调查一组观察变量。
随便看	function bounded in measure function calculus function call function centroid function chart function class function completeness test approach function constant function continuous on the left function continuous on the right function convex hull function description function diagram function differentiable on the left function differentiable on the right function distribution of income function element function equation approach function field function field of a variety function generator function graph function group function independent testing functioning

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