Later I will demonstrate how smooth the transition can be from a two-states to three-states design when patterns are applied.
稍后我将会演示当模式被使用时，从一个两个状态设计到三个状态设计的转换是多么的平滑。
They seem to have studied the software design lessons from the last decade, though, sadly, I do run into a fair number of people who don't know their design patterns.
他们似乎已经从之前的十年中学到了软件设计的经验教训，尽管，让我伤心的是，我的确碰到过一些并不懂得其设计模式的人。
With the invention of design patterns, the idea is to reuse designs since it's easy and inexpensive to generate code from design models.
随着设计模式的发明，而且从设计模型中产生代码非常简单，所以复用设计便成为一种理念。
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