要执行挖掘，必须先告知算法，在哪些列能找到实际的商品，在哪一列包含如何将商品组合成交易的相关信息。
To perform mining, you have to tell the algorithm in which columns it finds the actual items and which column contains the information on how to group items into transactions.
从根本上讲，交易所希望将信用衍生产品变成交易商品。
Ultimately, the bourses hope to turn credit derivatives into exchange-traded products.
多年来，对特定的农业商品都有成交量限制。
Certain agricultural commodities have had position limits in place for years.
应用推荐