无法解决

Even the professor couldn't clarify the knotty point.

甚至教授也无法解决这个棘手问题。

Unless controlled the quality of musical file from fountainhead, otherwise inextricability.

除非从源头上控制了音乐文件的质量，否则无法解决。

Simple example, in regular procedure inextricability, breaks free from the convention, seeks the method.

最简单的，在常法无法解决的时候，打破常规，寻求方法。