很多重写会更加复杂，而另一些则与以前一样简单或者说更简单。
Many overrides are more complicated than this, while others are this easy or easier.
与以前的文章一样，我们将使用一个简单的“Hello”mdb示例。
As in the earlier article, we will use a simple "Hello" MDB example.
前瞻性测试与执行新的组合测试一样简单——一起测试以前未测试的Web服务规范。
Forward looking testing can be as simple as doing new compositional testing-testing the Web service specifications in combinations that have not been tested before.
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