首先构建一个模式工厂，并使用它建立订单模式的内存中表示。

Start by constructing a schema factory and use it to build an in-memory representation of the purchase order schema.

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罗西需要雇佣更多的工匠，这样他们可以确保订单按时完成。然后，他还必须建立两个新的仓库，使配送更快。

Rossi needed to take on more craftsmen so they could make sure the orders were ready on time, and then, he also had to set up two new warehouses to make distribution quicker.

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他为大约三分之一的客户建立了限价订单，以便在发生急剧震荡的时候买进一只跟踪股指的基金，或者是一只跟踪大宗商品行情的ETN。

He has set up limit orders for around a third of his clients to buy either a stock index fund or a commodity ETN in the event of a sharp swing.

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