【说来话长】〖shu lái huà cháng〗[dwell on it at greater length; cannot explain all that in just a few words; It's a long story to tell; It would take too long to tell that in full]

说梅止渴失业愁，

来自修资富寡头。

话不在行南柯梦，

长才短取骥外流。

表示事情很复杂，不是几句话就能说清楚。多指不大愉快的事。Show that things complicated, not a few words can say clearly. Also refers not very happy things.