Neither rhyme nor reason can explain this phenomenon.

既不押韵，也没有理由可以解释这种现象。

youdao

John's letter doesn't make sense; it is neither rhyme nor reason.

约翰的信写得不清楚，简直莫名其妙。

youdao

My first action on being appointed headmaster was to do away with a mass of petty rules and regulations that had neither rhyme nor reason to them.

我提升校长所干的第一件事就是要废除一大堆无意义的琐细的规章制度。

youdao

He then started talking, no rhyme nor reason to any of it, but it was all funny.

CNN: Gottfried: Jonathan Winters was mad brilliant