The two candidates are much of a muchness—it's hard to choose between them.

两位候选人不相上下—很难挑选。

《牛津词典》

They are all much of a muchness.

他们都是大同小异的。

《新英汉大辞典》

John and Robert dressed much of a muchness.

约翰和罗伯特穿着大同小异。

youdao

Now we might think that this is all much of a muchness.

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