The closures notation strips away the boilerplate associated with inner classes, allowing a more compact (and more importantly, more direct) expression of the desired data operation.

闭包标注取消了与内部类相关的引用，允许更紧凑(重点更突出、更直接)地表示需要的数据操作。

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The splitting operation accomplished by the "\w+" expression in this case could be just as easily accomplished with the String.Split method, which would be much faster.

此例中通过“\w+”表达式完成的拆分操作可以恰好通过 String.Split 方法轻松地完成，那样速度会更快。

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It says that the function must be used in an expression involving the comparison operation and that the search method "equals" of the index extension hash_index is referred to.

这说明，该函数必须在一个涉及比较操作并且引用了索引扩展hash _ index的搜索方法“equals”的表达式中使用。

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