“理论的”用英语怎么说？

约翰·巴丁也是超导电性理论的创立者之一。John Bardeen was also co-developer of the theory of superconductivity.现在不是谈理论的时候。This was no time for theorizing.这些课程介绍的是统计学理论的基础。These courses provide the groundwork of statistical theory....