First-order change involves doing better what we already do, while second-order change alters the core ways we conduct business or even the basic business itself.
一阶变化侧重于把现在正在做的是做的更好，而二阶变化改变了我们从事的事业甚至基础生意本身的核心内容。
Golembiewski, Billingsley, and Yeager8 subsequently added another level of change, defining middle-order change as lying somewhere between the extremes of first - and second-order change.
戈伦比威斯基，比林斯利和耶格尔随后加入了另一个级别的变革，中阶变化。中阶变化是存在于一阶和二阶变化这两个极端之间的变化。
The second example shows how to find a customer and all associated orders for this customer, iterating through them in order to change the status attribute.
第二个例子将展示如何查找某一客户以及该客户的所有相关订单，为了更改状态属性，需要对它们进行迭代。
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