Grai ns, silks and COINS were used as medium.
商品交换媒介是谷帛、钱币并用。
Large areas of land, which formerly grew tobaccos, will now produce grai to feed some starving people in the world.
种植烟草的大量土地将被用来种庄稼以满足饥饿者的需要。
Then, this paper chooses the GRAI net as the process modeling method, after the studying of several popular modeling methods and tools from their advantages and disadvantages and scope of application;
接着，本文通过仔细研究列出了目前流行的几种建模方法和工具的优缺点和适用范围，选择了GRAI网作为本文的过程建模方法；
Then, this paper chooses the GRAI net as the process modeling method, after the studying of several popular modeling methods and tools from their advantages and disadvantages and scope of application;
接着，本文通过仔细研究列出了目前流行的几种建模方法和工具的优缺点和适用范围，选择了GRAI网作为本文的过程建模方法；
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