产品形状、颜色、软硬度可以根据客户需要改变。
Can be made in unique shapes, colours and softness according to customer requirements.
客户需要看到他们自己改变的动机，以及看到它们不改变将会发生什么结果。
Customers need to see for themselves the motivations to change, and see what the consequences of not changing would be.
业务客户也不需要在附加到方法上的注释改变时修改其代码。
Business clients also need not modify their code when annotations attached to the method change.
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