Shoes from the north, especially Beijing, had a 'bow' shape, an exaggerated curved sole and heel in one piece, often with leather reinforcements at toe and heel.

北方的鞋子，特别是北京，整体造型在鞋底和鞋跟部位呈一种夸张弯曲的弓形，在脚趾和后跟位置经常用皮革加固。

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Leather and synthetic sole.

皮革和合成鞋底。

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Leather upper, lining and sole.

皮革鞋面，衬里和鞋底。

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It says the price index contained this amount of beef, this amount of sheep wool, this amount of sole leather, and this amount of corn; that was the first consumer price index ever used for financial contracts.

指数中包括这些数量的牛肉,这些数量的羊毛,这些数量的鞋底皮,这些数量的玉米,这是在金融合约里出现的,第一个消费者物价指数

耶鲁公开课 - 金融市场课程节选