His family has been raising cows and sheep for 100 years in Sweet Grass County, whose seat, Big Timber, was once a center of the American wool trade.

他们在白菖蒲县放养牛羊已经有一百年的历史，白菖蒲县盛产凳子，大木料，曾经是美国的木材交易中心。

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Demand for this exotic fabric eventually created the lucrative trade route now known as the Silk Road, taking silk westward and bringing gold, silver and wool to the East.

对这种具有异国情调的面料的需求最终创造了有利可图的贸易路线，即现在所说的丝绸之路，这条路线把丝绸带向西方，把金、银和羊毛带到东方。

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Or they might trade with a neighbor, giving him grain in exchange for animal hides or sheep's wool.

或者他们可以和邻居做些易货交易，用粮食换兽皮或羊毛。

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