这讨厌的自由基会导致你细胞的结构性破坏，这种损害被认为是患癌症主要原因之一。

This nasty free radical causes structural damage to your cells, and such damage is thought to be one of the primary causes of cancer.

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为了理解这其中的原因，我们需要稍微靠近一点看一看，到底是需要用什么来支持方法和域的添加操作（甚至更深入一些，修改继承的层次结构）。

To understand why, we need to look a little closer as to what exactly is necessary to support adding methods and fields (and even more advanced, changing the inheritance hierarchy).

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您将了解到，在使用WebSphere ESB时，这实际上并不需要额外的工作，原因是它具有基础服务组件体系结构(SCA)。

What you will see is that this does not actually require a lot of extra work when using WebSphere ESB because of its underlying Service Component Architecture (SCA).

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