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。
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.
概要描述中移基本需求，指明交互的实体名称和相互关系，即角色定义，给出uml用例图。
In the outline description moves the basic demand, indicates the interactive entity name and the reciprocity, namely the role definition, produces UML to use the illustration.
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