I myself have some friendly disagreements with Frank about many of these topics, but I always learn something important from him in our exchanges, and I believe you will, too.
我与弗兰克在其中一些观点上存在这温和的不一致意见，但我从我们的交流中获得了非常重要的启示，相信读者也会的。
Every time they hit a problem, they will learn something important.
每当他们解决一个问题，他们就会学到一些重要的东西。
Every time they hit a problem, they will learn something important.
每当他们解决一个问题，他们就会学到一些重要的东西。
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