假定您的代码要求不变，您将不会明显地发现更改代码的需要。
Given that the requirements of your code do not change, you should not find the need to change code significantly.
假定要求你记住一组词：男人、凳子、狗、书桌、女人、马、孩子、猫、椅子。
Suppose you are asked to remember the following list of words: man, bench, dog, desk, woman, horse, child, cat, chair.
虽然没有明确要求，但是RichFaces假定下面这些JAR也是可用的。
Although they are not noted as explicit requirements, RichFaces assumes the following JARs are also available.
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