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1·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》

2·They are all much of a muchness.

他们都是大同小异的。《新英汉大辞典》

3·John and Robert dressed much of a muchness.

约翰和罗伯特穿着大同小异。

4·It's hard to choose between the two candidates: they're both much of a muchness.

很难在这两个候选人中作选择；他们俩不分上下。