How can a nonscientist explain an abstruse theory with such assurance?

么一个非科学家对这一抽象理论的解释如此自信?

Einstein’s theory of relativity is very abstruse.

爱因斯坦的相对论非常难懂。

The professor's lectures were so abstruse that students tended to avoid them. What is

这个教授的课如此深奥以致于学生们常常逃课。