但是由于他们要走的路都是用比较光滑的砖铺设的，普通金属马掌太滑了，根本抓不住地，所以，所有马的马掌都需要重新换上橡胶马掌。
Because the streets were paved with smooth bricks, the usual steel horseshoes proved to be too "slick" and the horses were all re-shod with rubber horseshoes.
铁匠用一块烧红的金属敲制成一个马掌。
The blacksmith hammered a horseshoe from the red - hot metal.
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