He was trying to ravel out the complicated series of events that had led to this situation.他那时正试图把导致这一局面的一系列复杂事件理出个头绪来。
We have to ravel the matter out.我们必须把事情弄个水落石出。
Can ravel out what's in my head.定能解开我头脑中的疑团。