“field trial”的概念、定义、翻译、参考文献-科学参考

单词	field trial
释义	field trial Encyclopedia 医学现场试验释 field trial现场试验在社区的现场条件下，以尚未患某病的人作为研究对象，按随机分配原则将研究对象分为实验组和对照组，实验组给予某种干预措施（研究因素），对照组不给予干预措施或给予安慰剂，比较两组结局的方法。又称人群预防试验。
随便看	ring of differential polynomials ring of dual numbers ring of endomorphisms ring of finite generation ring of finite presentation ring of fractions ring of functions ring of germs ring of integers ring of invariants ring of Jupiter ring of linear transformations ring of manifolds ring of matrices ring of Neptune ring of numbers ring of operators ring of polynomials ring of power series ring of principal integers ring of quaternion ring of quaternions ring of quotients ring of real character ring of representations

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。