By factoring some logic out of your advice and into a helper class (or method), you can write tests that check your application's crosscutting behavior independent of its crosscutting specification.
通过将一些逻辑从建议中分离到helper类中(或者方法中)，可以编写与横切规范无关的、检查应用程序横切行为的测试。
Tell others, especially people who have already published a book, about your intention to write a book. You never know what kind of helpful advice you might get!
首先要把你写书的想法告诉别人，特别是那些已经出过书的人，因为也许就有人能在某些方面给你有用的建议！
I thought I'd write to you and ask for your advice.
我想我最好就是写信给你，向你要一些建议。
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