The key features of the middle sole are created during production.

独到的生产工艺赋予鞋中底与众不同的卓越特性。

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Simply put, the values that lead to failure are in no way the sole preserve of the upper middle classes, let alone white people.

FORBES: Rather Than Bash the Rich, We Should Emulate Them

The act of throwing a shoe at someone or showing them your sole is "incredibly offensive" in the Middle East, he said.

CNN: Why shoe throwing is 'incredibly offensive'

It would do it in a way that would protect seniors and middle-class families, and not ask them to bear the sole burden of the need to reduce our deficit.

WHITEHOUSE: Press Briefing