那篇文章演示了为什么DI是处理包含相互引用的类之间耦合点的有效方式。

That article demonstrated why DI is an effective way to handle coupling points between classes that contain references to each other.

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既然两个规范已经相互引用，两者的集成也就可以在一个较高的层次达成。

Since both specifications already leverage on each other integration of both can already be achieved at a high-level.

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表达式可以引用其他表达式列，但循环引用(其中两个表达式相互引用)将产生异常。

Expressions can reference other expression columns; however, a circular reference, in which two expressions reference each other, will generate an exception.

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